001<h3>Admissions Data for UPR Mayaguez 2003-2013</h3>
Information for all students who applied and were accepted to UPR Mayaguez between 2003 and 2013.
<br><strong>Research Question: </strong>Predict success at UPR   <br>
Data set : <b>upr</b><HR>
002<h3>Age by Gender in PR (Census 2000)</h3>
Breakdown of the population of USA and Puerto Rico by age and gender, according to the 2000 Census.<br> 
<br><strong>Research Question: </strong>Mean age in PR?<br>
Data set : <b>agesex</b><HR>
003<h3>Euro Coins</h3>
The data were collected by Herman Callaert at Hasselt University in Belgium. The euro coins 
were "borrowed" at a local bank. Two assistants, Sofie Bogaerts and Saskia Litiere weighted 
the coins one by one, in laboratory conditions on a weighing scale of the type Sartorius BP 310s.
<br><strong>Research Question: </strong>What is the average weight of the coins? Are the weights different in different rolls?   <br>
<br>Data set : <b>euros</b><HR>
004<h3>Sex Ratios by State (American Community Survey 2004)</h3>
Sex ratios by state, without Puerto Rico. Data from the American Community Survey 2004. Includes upper and lower limits of 90% confidence interval.
<br><strong>Research Question:</strong> Example for confidence Intervals  <br>
<br>Data set : <b>sexratio</b><HR>
005<h3>John Kerrich's Coin Toss Experiment</h3>
While imprisoned by the Germans during World War II, the South African 
mathematician John Kerrich tossed a coin 10,000 times. 
Result: 5067 heads.
<br><strong>Research Question: </strong>Was that coin a fair coin?   <br>
<HR >
006<h3>Rogaine: Treatment for Hair Loss</h3>
Rogaine is the first treatment for hair loss approved by the Food and Drug Administration. Here we have the results of one of the studies that were done to show that rogaine works. A randomized clinical trial was carried out. 1431 bald men were randomly assigned to two groups. The men in the treatment group received Rogaine, the men in the control group received a placebo. After some time the men were examined and assigned to one of 5 groups:<br>
No Growth = no difference <br><br>
New Vellus = some hair follicles<br>
Min Growth = minimal hair growth<br>
Mod Growth = moderate hair growth<br>
Den Growth = dense hair growth<br>
<br><strong>Research Question: </strong>Does rogaine work?   <br>
<br>Data set : <b>rogaine</b><HR>
007<h3>Drownings in Los Angeles</h3>
Data is from O'Carroll PW, Alkon E, Weiss B. <em>Drowning mortality in Los Angeles County, 1976 to 1984</em>, JAMA, 1988 Jul 15;260(3):380-3.<br>
    Drowning is the fourth leading cause of unintentional injury death in Los Angeles County. 
    We examined data collected by the Los Angeles County Coroner's Office on drownings that occurred 
    in the county from 1976 through 1984. There were 1587 drownings (1130 males and 457 females) during 
    this nine-year period, for an annual rate of 2.36 drownings per 100,000 persons (3.44 for males and 
    1.33 for females). 
<br><strong>Research Question:</strong> Is there a difference in the methods of drowning of men and women?   <br>    
<br>Data set : <b>drownings</b><HR>
008<h3>Study Habits of Students</h3>
The Survey of Study Habits and Attitudes (SSHA) is a psychological test 
that measures the motivation, attitude towards school, and the 
study habits of students. Scores range from 0 to 200. We have the scores of 
20 male and 18 female first-year students at a private college.
<br><strong>Research Question: </strong>Do the scores differ by gender?   <br>
<br>Data set : <b>studyhabits</b><HR>
009<h3>Balance and Age</h3>
Is it harder to maintain your balance while you are concentrating? Nine elderly (6 men and 3 women) and 
eight young men were subjects in this experiment. Each subject stood barefoot on a "force platform" 
and was asked to maintain a stable upright position and to react as quickly as possible to an 
unpredictable noise by pressing a hand held button. The noise came randomly and the subject concentrated on reacting as quickly as possible. The platform automatically measured how much each subject swayed in millimeters in both the forward/backward and the side-to-side directions.
<br><strong>Research Question: </strong>Is there a difference between the young and old?   <br>
<br>Data set : <b>balance</b><HR>
010<h3>Drug Use of Mothers and the Health of the Newborn</h3>
Chasnoff and others obtained several measures and responses
for newborn babies whose mothers were classified by degree of cocain use.
The study was conducted in the Perinatal Center for Chemical Dependence
at Northwestern University Medical School. The measurement given here is
the length of the newborn. Is there a significant difference between the groups?
<p>Source: Cocaine abuse during pregnancy: correlation between prenatal care and perinatal outcome
<br>Authors: SN MacGregor, LG Keith, JA Bachicha, and IJ Chasnoff
<br>Obstetrics & Gynecology 1989;74:882-885 
<br><strong>Research Question: </strong>Does cocain use effect the health (length) of the babies?   <br>  
<br>Data set : <b>mothers and cocain use</b><HR>
011<h3>Flammability of Childrens Sleepwear</h3>
The flammability of fabric used in children's sleepwear is tested by placing a flame under a piece 
of fabric until it ignites. The flame is then removed, and the fabric stops burning. The length of
 the charred portion of the fabric is measured. In the Data set (Minitab) pieces of the same cloth
  were sent to five different laboratories, which then carried out this experiment eleven times.
<br><strong>Research Question: </strong> Are there differences between the labs?  <br>  
<br>Data set : <b>flammability</b><HR>
012<h3>Cancer Survival</h3>
Winners of two Nobel Prices:
<table border="1">
  <tr>
    <td >Linus Pauling, USA</td>
    <td >Chemistry1954&nbsp;&nbsp; &quot;Studies Of Molecular Structure And The
    Chemical Bond&quot;</td>
    <td >Peace 1962 &quot;Fight Against Atomic Testing&quot;</td>
  </tr>
  <tr>
    <td >Frederick Sanger, USA</td>
    <td >Chemistry 1958 &quot;Determining Structure Of Insulin Molecule&quot;</td>
    <td >Chemistry 1980 &quot;Biochemical Studies Of Nucleic Acids&quot;</td>
  </tr>
  <tr>
    <td >Marie Sklodowska Curie, Poland/France</td>
    <td >Physics 1903 &quot;Discovery Of Radioactivity In Uranium Work On
    Radioactivity Based On Becquerel's Discovery&quot;</td>
    <td >Chemistry 1911 &quot;discovery of the elements radium and polonium&quot;</td>
  </tr>
  <tr>
    <td >John Bardeen, USA</td>
    <td >Physics 1952 &quot;Development of the transistor effect&quot;</td>
    <td >Physics 1972 &quot;Theory of Superconductivity&quot;</td>
  </tr></table>
Patients with advanced cancers of the stomach, bronchus, colon,
ovary or breast were treated with ascorbate. The purpose of the study was
to determine if patient survival differed with respect to the organ
affected by the cancer.
<BR>Cameron, E. and Pauling, L. (1978) Supplemental ascorbate in the supportive 
treatment of cancer:  re-evaluation of prolongation of survival times in 
terminal human cancer.  Proceedings of the National Academy of Science USA. 
<br><strong>Research Question: </strong>Are there differences between the survival times of different 
cancers?   <br>
<br>Data set : <b>cancersurvival</b><HR>
013<h3>1970 Military Draft </h3>
	In 1970, Congress instituted a random selection process for the military draft.  All 366 possible 
	birth dates were placed in plastic capsules in a rotating drum and were selected one by one. 
	The first date drawn from the drum received draft number one and eligible men born on that date were 
	drafted first.  In a truly random lottery there should be no relationship between the date and the 
	draft number.
	<br><strong>Research Question: </strong> Was the draft truly random?  <br>
<br>Data set : <b>draft</b><HR>
014<h3>Capacity of Wells in the Appalachian Mountains</h3>
The specific capacity of wells in the Appalachian mountain region
of Pennsylvania has been measured in four rock types. (Knopman 1990)
The rock types are dolomite, limestone, siliclastic and metamorphic.
the capacities are recorded in gal/min/ft.
<br><strong>Research Question: </strong>Are there differences between the capacities of different rock types?   <br>
<br>Data set : <b>rocks</b><HR>
015<h3>Brain and Body Weight of Mammals</h3>
Brain (in grams) and Body Weight (in kg) of 62 Mammals.
<br><strong>Research Question: </strong> What is the relationship between the sizes of the body and the brain?  <br>
<br>Data set : <b>brainsize</b><HR>
016<h3>Cultural Differences in Equipment Use</h3>
A US company manufactures equipment that is used in the production
of semiconductors. The firm is considering a costly redesign that 
will improve the performance of its equipment. The performance is 
characterized as mean time between failures (MTBF). Most of the 
companies customers are in the USA, Europe and Japan, and there is 
anectotal evidence that the Japanese customers typically get better 
performance from the users in the USA and Europe. 
<br><strong>Research Question: </strong> Is there a difference in MTBW by country?  <br>
<br>Data set : <b>culture</b><HR>
017<h3>Cuckoo Eggs</h3>
That cuckoo eggs were peculiar to the locality where found was already known in 1892. A study by E.B.
 Chance in 1940 called The Truth About the Cuckoo demonstrated that cuckoos return year after year 
 to the same territory and lay their eggs in the nests of a particular host species. Further, cuckoos 
 appear to mate only within their territory. Therefore, geographical sub-species are developed, each
  with a dominant foster-parent species, and natural selection has ensured the survival of cuckoos most
   fitted to lay eggs that would be adopted by a particular foster-parent species. The data has the 
   lengths of cuckoo eggs found in the nests of six other bird species (drawn from the work of O.M. 
   Latter in 1902).
<br><strong>Research Question: </strong> Are there differences in the lengths of the eggs for different birds?  <br>   
<br>Data set : <b>cuckoo</b><HR>
018<h3>Wine Consumption and Hearts Disease</h3>
Data for 19 developed countries on wine consumption (liters of wine per person per year) and deaths 
from heart disease (per 100000 people). (taken from David Moore: The Active Practice of Statistics)
<br><strong>Research Question: </strong> What is the relationship between wine consumption and heart disease rate?  <br>
<br>Data set : <b>wine</b><HR>
019<h3>Hubble's Constant</h3>
<br>
In 1929 Edwin Hubble published a paper showing a relationship between the distance 
and radial velocity away from Earth of "extra-galactic nebulae" (galaxies).  His 
findings revolutionized astronomy. The "Hubble constant", the slope of the 
regression of velocity (Y) on distance (X), is still a subject of research and 
debate.  The data here are those Hubble published in his original paper. It also has 
data from much more recent studies.
<br><strong>Research Question: </strong> Find a confidence interval for the Hubble constant, the
slope of the least squares regression line of Velocity on Distance  <br>
<br>Data set : <b>hubble</b><HR>
020<h3>Quality of Fish</h3>
A study was conducted to examine the quality of fish after several days in ice storage. 
Ten raw fish of the same kind and quality were caught and prepared for storage. Two of the 
fish were placed in ice storage immediately after being caught, two were placed there after 3
hours, and two each after 6, 9 and 12 hours. Then all the fish were left in storage for 7 days. 
Finally they were examined and rated accorrding to their "freshness".
<br><strong>Research Question: </strong> Find a confidence interval for a fish that was placed in
storage after 4 hours (after 15 hours)   <br>
<br>Data set : <b>fish</b><HR>
021<h3>Smoking and Lung Cancer Rates</h3>
Data on the per capita numbers of cigarettes smoked (sold) by 43 states and the District of Columbia in 
1960 together with death rates per thousand population from lung cancer <BR>
<br><strong>Research Question: </strong> Find the relationship between the number of cigarettest smoked and the lung cancer rate  <br>
Data set (Minitab): <b><a href="http://academic.uprm.edu/wrolke/data/smoking.MPJ">smoking</a></b>
<br>Data set : <b></b><HR>
022<h3>Fabric Wear</h3>
Results from an experiment designed to determine how much the speed of a washing machine effects the wear on a new fabric. The machine was run at 5 different speeds (measured in rpm) and with six pieces of fabric each.
<br><strong>Research Question: </strong> Find the relationship between the speed of the machine and the amount of wear <br>
<br>Data set : <b>fabric wear</b><HR>
023<h3>Usage of Electricity</h3>
In Westchester County, north of New York City, Consolidated Edison bills residential customers for electricity on a monthly basis. The company wants to predict residential usage, in order to plan purchases of fuel and budget revenue flow. The data includes information on usage (in kilowatt-hours per day) and average monthly temperature for 55 consecutive months for an all-electric home. 
Data on consumption of electricity and the temperature in Westchester County, NY. 
<br><strong>Research Question: </strong> Find a model useful for predicting the electricity usage  <br>
<br>Data set : <b>elusage</b><HR>
024<h3>Sex Discrimination in Graduate School Admissions</h3>
The famous Berkeley data on sex discrimination. In fall quarter, 1973, there were 8,442 men who applied for admission to graduate school, and 4,321 women.
<br>Source: Freeman, D., Pisani, R., Purves, R. and Adhikiri, A. (1991)  Statistics (2nd edition). WW Norton.
<br><strong>Research Question: </strong> Example for Simpson's paradox  <br>
<br>Data set : <b>berkeleyadmissions1</b><HR>
025<h3>Testing Hearing Aids</h3>
Reference: Loven, Faith. (1981). A Study of the Interlist Equivalency of
the CID W-22 Word List Presented in Quiet and in Noise. Unpublished MS
Thesis, University of Iowa.
<BR>Description: Percent of a Standard 50-word list heard correctly in the
presence of background noise. 24 subjects with normal hearing listened to
standard audiology tapes of English words at low volume with a noisy
background. They repeated the words and were scored correct or incorrect in
their perception of the words. The order of list presentation was
randomized.
<BR>The word lists are standard audiology tools for assessing hearing. They are
calibrated to be equally difficult to perceive. However, the original
calibration was performed with normal-hearing subjects and no noise
background. The experimenter wished to determine whether the lists were
still equally difficult to understand in the presence of a noisy
background.
<br><strong>Research Question: </strong> Are the lists still well calibrated?  <br>
<br>Data set : <b>hearingaid</b><HR>
026<h3>Gasoline type and Pollution</h3>
In an experiment to reduce pollution, four different blends of gasoline are tested in each of three makes of automobiles. The cars are driven a fixed distance to determine the mpg (miles per gallon) The experiment is repeated three times for each blend-automobile combination. (Taken from Lyman Ott)
<br><strong>Research Question: </strong> Are there differences between gasoline types?  <br>
<br>Data set : <b>gasoline</b><HR>
027<h3>Film Thickness in Semiconductor Production</h3>
Chemical vapor deposition is a process used in the semiconductor industry
to deposit thin films of silicon dioxide and photoresit on substrates of
wafers as they are manufactured. The films must be as thin as possible and 
have a uniform thickness, which is measured by a process called infrared 
interference. A process engineer wants to evaluate a low-pressure chemical 
vapor deposition process that reduces costs and increases productivity.
The engineer has set up an experiment to study the effect of chamber temperature
and pressure on film thickness.
<br><strong>Research Question: </strong> What is(are) the (statistically significantly) best combination(s) 
of temperature and pressure?   <br>
<br>Data set : <b>filmcoatings</b><HR>
028<h3>24) Water Quality and Mining</h3>
The effects of mining and rock type on water quality. 
<br><strong>Research Question: </strong> Can mines be restored to their original level?  <br>
<br>Data set : <b>mines</b><HR>
029<h3>Environment, Safety and Health Attitudes</h3>
Environment, Safety and Health Attitudes of employees of a laboratory.
Employees are given a questionaire, which is then collated into an average
score from 1(bad) to 10(good). We also have available the length of 
service of the employee, their gender and their race.
<br><strong>Research Question: </strong>Find a model to predict the es&h score   <br>
<br>Data set : <b>es&h</b><HR>
030<h3>Noise and Air Filters for Cars</h3>
The data are from a statement by Texaco, Inc. to the Air and Water Pollution
Subcommittee of the Senate Public Works Committee on June 26, 1973.
Mr. John McKinley, President of Texaco, cited  the Octel filter, developed by
Associated Octel Company as effective in reducing pollution. However,
questions had been raised about the effects of pollution filters on aspects of
vehicle performance, including noise levels. He referred to data presented
in the datafile associated with this story as evidence that the Octel filter was
was at least as good as a standard silencer in controlling vehicle noise levels.
<br><strong>Research Question: </strong> Are Octel filters (statistically significantly) more quiet?  <br>
<br>Data set : <b>airfilters</b><HR>
031<h3>House Prices</h3>
Prices of residencies located 30 miles south of a large metropolitan area with several possible predictor variables. Notice the 1.7 baths!
<br><strong>Research Question: </strong>  Predict the house price 
<br>Data set : <b>houseprice</b><HR>
032<h3>Air Pollution and Mortality</h3>
The dependent variable for analysis is age adjusted mortality (called "Mortality"). The
data include variables measuring demographic characteristics of the cities, variables 
measuring climate characteristics, and variables recording the pollution potential of 
three different air pollutants.
<br><strong>Research Question: </strong> Does any of the pollutants effect mortality after
taking all other predictors into account?
<br>Data set : <b>airpollution</b><HR>
033<h3>Headaches and Pain Reliever</h3>
A pharmaceutical company set up an experiment in which patients
with a common type of headache were treated with a new analgesic or
pain reliever. The analgesic was given to each patient in one of four
dosage levels: 2,5,7 or 10 grams. Then the time until noticeable relieve
was recorded in minutes. In addition the sex and the blood pressure of
each patient was recorded. The blood pressure groups where formed by 
comparing each patients diastolic and systolic pressure reading with 
historical data. Based on this comparison the patients are assigned  to
one of three types: low (0.25), medium (0.5), high (0.75) according to
the respective quantiles of the historic data. 
<br><strong>Research Question: </strong> Find best dosage level
  <br>Data set : <b>headache</b><HR>
034<h3>Temperature in the USA</h3>
The data gives the normal average January minimum temperature in degrees Fahrenheit with the latitude  and longitude of 56 U.S. cities.  (For each year from 1931 to 1960, the daily
minimum temperatures in January were added together and divided by 31.  Then, the averages for each year were averaged over the 30 years.)
City:		City
State		State postal abbreviation
JanTemp: 	Average January minimum temperature in degrees F. from 1931-1960
Latitude:     	Latitude in degrees north of the equator
Longitude:    	Longitude in degrees west of the prime meridian
<br><strong>Research Question: </strong>  Predict Temperature
 <br>Data set : <b>ustemperature</b><HR>
035<h3>Alcohol and Tobacco Expenditure</h3>
Data from a British government survey of household spending may be used to examine the relationship between household spending on tobacco products and alcoholic beverages. The numbers are the average expenditure for each of the 11 regions of England.
<br><strong>Research Question: </strong> How strong is the relationship between alcohol and tobacco expenditures?
  <br>Data set : <b>alcohol</b><HR>
036<h3>Gas Chromatography</h3>
Results of a study of gas chromatography, a technique which is used 
to detect very small amounts of a substance. Five measurements were taken for 
each of four specimens containing different amounts of the substance. The 
amount of the substance in each specimen was determined before the experiment. 
The response variable is the output reading from the gas chromatograph. The 
purpose of the study is to <strong>calibrate</strong> the chromatograph by relating the actual 
amount of the substance to the chromatograph reading.
<br><strong>Research Question: </strong> Predict amount of substance
  <br>Data set : <b>chromatography</b><HR>
037<h3>Olympics</h3>
Data on the gold medal winning performances in the men's long jump, high jump and discus throw, 
the women's long jump and the 200m times for men and women for the modern Olympic games.
<br><strong>Research Question: </strong> Find models for predicting winning performances<BR>
Data set (Minitab): <B><a href="http://academic.uprm.edu/wrolke/data/olympics.MPJ">olympics</a></B>
<br>Data set : <b>olympics</b><HR>
038<h3>Golf Scores</h3>
We have the scores for the four rounds of the 2006 AT&T Peeble Beach National Pro-AM, 2006 Honda Classic, 2006 Shell Huston Open, 2006 Byron Nelson Classic and the 2007 Sony Open.
<br><strong>Research Question: </strong> What is the relationship between rounds 1 and 2?  <br>
Data set : <b>golfscores</b><HR>
039<h3>Seat Belt Use and Injuries</h3>
This Data set gives historic percentages and actual numbers for types of injuries of
drivers and front seat passengers in tow-away crashes in Charlottesville, Virginia before and after 
a mandatory seat belt law went into effect. 
<br><strong>Research Question: </strong>Did the seat belt law have an effect?
<BR>Dats set: <B><a href="http://academic.uprm.edu/wrolke/data/seatbelt.MPJ">seatbelt</a></B>
<br>Data set : <b>seatbelt</b><HR>
040<h3>Gregor Mendel's (1823-1884) Genetic Experiments </h3>
Data from Experiments in Plant Hybridization (1865), 
One of Gregor Mendel's breeding trials. His theory of genetics predicted that the number of 
peas would be in the proportions 9:3:3:1. 
<br><strong>Research Question: </strong>Does the data agree with his proportions?
  <br><br>Data set : <b>mendel</b><HR>
041<h3>Death by Horsekicks</h3>
Number of Deaths by Horsekicks in the Prussian Army from 1875-1894 for 14 Corps 
<br><strong>Research Question: </strong>  Does the data come from a Poisson distrubtion?
<br>Data set : <b>horsekicks</b><HR>
042<h3>Oxygen Concentration and Fermentation</h3>
The effect of oxygen level on fermentation end products was examined
in the article "Effects of Oxygen on Pyruvate FormateLyase in Situ
and Sugar Metabolism of Streptococcusmutans and Streptococcus samguis"
(Infection and Immunity 1985, p129-134) Four oxygen concentrations 
(0, 46,92, 138 microM) and two sugar types (galactose and glucose) were
used. The amount of ethanol was measured for each oxygen-sugar combination
and each measurement was repeated twice. 
<br><strong>Research Question: </strong> What is the effect of the oxygen level and the sugar
type on the amount of ethonal produced?
  <br>Data set : <b>fermentation</b><HR>
043<h3>Forbes Companies</h3>
Data on 79 companies, from Forbes magacine
<br><strong>Research Question: </strong> Various regression problems
  <br>Data set : <b>forbes</b><HR>
044<h3>Albuquerque House Prices</h3>
The data are a random sample of records of resales of homes from Feb 15 to Apr 30, 1993 from the files maintained by the Albuquerque Board of Realtors. This type of data is collected by multiple listing agencies in many cities and is used by realtors as an information base. 
<br>Variables:
<br> Price = Selling price ($hundreds)
<br> Sqfeet = Square feet of living space
<br> Features = Number out of 11 features (dishwasher, refrigerator, microwave, disposer, washer, intercom, skylight(s), compactor, dryer, handicap fit, cable TV access
<br> Corner = Corner location (yes, coded as 0 and no, coded as 1)
<br> Tax = Annual taxes ($) 
<p> For some of the houses not all the information was available. Such missing data is coded as *. 
<br><strong>Research Question: </strong> Predict the house prices
  <br>Data set : <b>albuquerque house price</b><HR>
045<h3>Treaments for Lowering Blood Pressure</h3>
Four different treatments (three drugs and a placebo) are to be evaluated for their impact on 
diastolic blood pressure. Thirty-two patients (16 male and 16 female) who have high blood pressure
 are randomly selected to participate in the experiment. They are randomly assigned to one of the 
 four treatments, whith 4 males and 4 females for each. The patients diastolic blood pressure is 
 measured before and after each treatment. The differences (before-after) are recorded.  
<br><strong>Research Question: </strong> Is the treatment effective for both sexes?
  <br>Data set : <b>bloodpressure</b><HR>
046<h3>Cats</h3>
Anatomical Data from Domestic Cats<br>
Description: The heart and body weights of samples of male and female cats used for digitalis experiments. 
The cats were all adult, over 2 kg body weight. <br>
Source: R. A. Fisher (1947) The analysis of covariance method for the relation between a part and the whole. Journal of Biometrics
<br><strong>Research Question: </strong> Find a model for predicting heart weight  <br>
Data set : <b>cats</b><HR>
047<h3>Medieval Churches</h3>
 Gould (1973) has speculated on the applicability of biological laws of shape to other objects. 
 To study this, he chose a "simple minded" example: medieval churches. These were built in a very wide range of sizes and shapes, to serve fairly similar purposes. Because of limitations due to the use of stone as a building material, we might speculate that the relationship between various measurements of the churches will be very strong. The data lists the perimeter in hundreds of meters and area in hundreds of square meters for 25 post-Conquest Romanesque churches in Britain. The data were measured from ground plans given by Clapharn (1934) and kindly provided by S. J. Gould.
<br><strong>Research Question: </strong> Find a good model for predicting area  <br>
Data set : <b>church</b><HR>
048<h3>Watering Schedules and Crop Yield</h3>
In an experiment in agriculture 8 different watering schedules were used to grow a certain crop.
<br><strong>Research Question: </strong>  How does the yiled differ by schedule?
 <br>Data set : <b>crop</b><HR>
049<h3>Prices of Diamond Rings</h3>
The data contains the prices of ladies diamond rings and the carat size of their diamond stones. The rings are made with gold of 20 carats purity and are each mounted with a single diamond stone. The source of the data is a full page advertisement placed in the _Straits Times_ newspaper issue of February 29, 1992, by a Singapore-based retailer of diamond jewelry. 
<br><strong>Research Question: </strong> predict price from carat <br>
Data set : <b>diamond</b><HR>
050<h3>Pets and one-year Survival</h3>
Psychological and social factors can influence the survival of patients with 
serious diseases. One study examined the relationship between survival of patients 
with coronary heart disease and pet ownership. Each of 92 patients was classified as 
having a pet or not, and whether they survived one year. Here is the data, from Erika 
Friedmann et al., "Animal companions and one-year survival of patients after discharge 
from a coronary care unit.":
  <P> 
<TABLE Border="2">
	<TR>
		<TD><B>Patient Status</B></TD><TD><B>Owns a Pet</B></TD><TD><B>Does not Own a Pet</B></TD>
	</TR>
	<TR>
		<TD><B>Alive</B></TD><TD>50</TD><TD>28</TD>
	</TR>
	<TR>
		<TD><B>Dead</B></TD><TD>3</TD><TD>11</TD>
	</TR>
</TABLE>
<br><strong>Research Question: </strong> Is there a relationship between pet ownership and survival?
<HR >
051<h3>Fiber in Crackers</h3>
A manufacturer was considering marketing crackers high in a certain kind of edible fiber as a dieting aid. Dieters would consume some crackers before a meal, filling their stomachs so that they would feel less hungry and eat less. A laboratory studied whether people would in fact eat less in this way. 
Overweight female subjects ate crackers with different types of fiber (bran fiber, gum fiber, both, and a 
control cracker) and were then allowed to eat as much as they wished from a prepared menu. The amount of 
food they consumed and their weight were monitored, along with any side effects they reported. 
Unfortunately, some subjects developed uncomfortable bloating and gastric upset from some of the fiber 
crackers.
<br><strong>Research Question: </strong> How does food consumed depend on the type of cracker?  <br>
<br>Data set : <b>fiber</b><HR>
052<h3>Treatment for Hostility</h3>
A clinical psychologist wished to compare three methods for reducing hostility levels in university students. A certain psychological test (HLT) was used to measure the degree of hostility. High scores on this test were taken to indicate great hostility. Eleven students obtaining high and nearly equal scores were used in the experiment. Five were selected at random from among the 11 problem cases and treated by method A. Three were taken at random from the remaining six students and treated by method B. The other three students were treated by method C. All treatments continued throughout a semester. Each student was given the HLT test again at the end of the semester.
<br><strong>Research Question: </strong> Which method is best for treating hostility?  <br>
<br>Data set : <b>hostility</b><HR>
053<h3>GPA and IQ</h3>
Data on  grade point average of high school students (measured on a scale of 0-12) and their IQ and gender.
<br><strong>Research Question: </strong> What is the relationship between IQ and GPA by Gender   <br>
<br>Data set : <b>iq</b><HR>
054<h3>Larvea of Mosquito</h3>
Dowdy and Wearden (1983) presented a set of data containing measurements on the number of larvea of 
Chaoborus (a non blod-sucking type of mosquito), the depth of the lake were the larvea were found,
 the brackishness (or how clear) of the water and the amount of oxygen in the water.
<br><strong>Research Question: </strong> Find a model for predicting the number of larvea 
 <br>Data set : <b>larvea</b><HR>
055<h3>Employee Attitudes</h3>
A survey was conducted to study the attitude of the employees of 30 departments of a large financial institution towards their supervisors. The employees were asked to give a score of 0 (=totally disagree) to 100 (=totally agree). The Data set (Minitab) contains the average score per department. The variables and the respective questions are:<br>
<TABLE Border = "1">
	<TR><TD><B>Variable id</B></TD>
		<TD><B>Question in Survey</B></TD>
	</TR>
	<TR>
		<TD>Rating</TD>
		<TD>My supervisor is doing an outstanding job</TD>
	</TR>
	<TR>
		<TD>Complaints</TD>
		<TD>He/She handles complaints well</TD>
	</TR>
	<TR>
		<TD>Privileges</TD>
		<TD>He/She does not allow special privileges</TD>
	</TR>
	<TR>
		<TD>Learn new Things</TD>
		<TD>He/She gives us the opportunity to learn new things</TD>
	</TR>
	<TR>
		<TD>Raises</TD>
		<TD>He/She bases raises on the performance</TD>
	</TR>
	<TR>
		<TD>Too Critical</TD>
		<TD>He/She is too critical of poor performances</TD>
	</TR>
	<TR>
		<TD>Advancing</TD>
		<TD>We have a good rate of advancing to new jobs</TD>
	</TR>
</TABLE>
<br><strong>Research Question: </strong> find a model for predicting the ratings  <br>
Data set : <b>ratings</b><HR>
056<h3>Survey of Children</h3>
We have data on students in grades 4-6 from three school districts in Ingham and Clinton Counties, Michigan. Chase and Dummer stratified their sample, selecting students from urban, suburban, and rural school districts with approximately 1/3 of their sample coming from each district. Students indicated whether good grades, athletic ability, or popularity was most important to them. They also ranked four factors: grades, sports, looks, and money, in order of their importance for popularity. The questionnaire also asked for gender, grade level, and other demographic information. <br>
Variable ids:<br> 
1. Gender: Boy or girl <br>
2. Grade: 4, 5 or 6 <br>
3. Age: Age in years <br>
4. Race: White, Other <br>
5. Urban/Rural: Rural, Suburban, or Urban school district <br>
6. School: Brentwood Elementary, Brentwood Middle, Ridge, Sand, Eureka, Brown, Main, Portage, Westdale Middle <br>
7. Goals: Student's choice in the personal goals question where options were 1 = Make Good Grades, 2 = Be Popular, 3 = Be Good in Sports <br>
8. Grades: Rank of "make good grades" (1=most important for popularity, 4=least important) <br>
9. Sports: Rank of "being good at sports" (1=most important for popularity, 4=least important) <br>
10. Looks: Rank of "being handsome or pretty" (1=most important for popularity, 4=least important) <br>
11. Money: Rank of "having lots of money" (1=most important for popularity, 4=least important) 
<br><strong>Research Question: </strong>  What are the relationships between the variables? <br>
<br>Data set : <b>popular</b><HR>
057<h3>Salaries in a Company</h3>
A company did a survey of their salaries, together with information on 
the number of years people have worked there and their job level, either "low" or "high".
<br><strong>Research Question: </strong> find a model to predict the salaries  <br>
<br>Data set : <b>salaries</b><HR>
058<h3>Singers in the New York Choral Society</h3>
Each singer in the NY Choral Society in 1979 self-reported his or her height to the nearest inch. Their voice parts in order from highest pitch to lowest pitch are Soprano, Alto, Tenor, Bass. The first two are typically sung by female voices and the last two by male voices.
<br><strong>Research Question: </strong> What is the relationship between the voice and the height?  <br>
<br>Data set : <b>singer</b><HR>
059<h3>Egyptian Skulls</h3>
Four measurements were made of male Egyptian skulls from five different time periods ranging from 4000 B.C. to 150 A.D. Are there are any differences in the skull sizes between the time periods? The researchers theorize that a change in skull size over time is evidence of the interbreeding of the Egyptians with immigrant populations over the years.<br>
The predictor variables are<br>
Maximal Breadth of Skull (MB)<br>
Basibregmatic Height of Skull (BH)<br>
Basialveolar Length of Skull (BL)<br>
Nasal Height of Skull (NH)<br>
Data is from Thomson, A. and Randall-Maciver, R. (1905) Ancient Races of the Thebaid, 
Oxford: Oxford University Press
<br><strong>Research Question: </strong> find a model for classification   <br>
<br>Data set : <b>skulls</b><HR>
060<h3>Liver and Toxins in Trout</h3>
Casella and Berger (p522) describe an experiment to measure
 the amount of deterioration on the liver of trouts, depending on three toxins and a control.
<br><strong>Research Question: </strong> Are there any diffences between the treatments?  <br>
<br>Data set : <b>trout</b><HR>
061<h3>Life Expectancy, TV's and Docters</h3>
For each of the 38 largest countries in the world (according to 1990 population ures), data are given for the country's life expectancy at birth, number of People per TV, and number of People per Doctor.
SOURCE: _The World Almanac and Book of Facts 1993_ (1993), New York: Pharos Books 
<br><strong>Research Question: </strong> How strong are the relationships of NUmber of TV's and of Number of doctors
with Life Expectancy?  <br>
<br>Data set : <b>tv</b><HR>
062<h3>Deaths in Car Accidents (2002)</h3>
Number of fatalities in car crashes in the US, by age and gender. Source: <a href="http://www.cdc.gov/ncipc/">National Center for Injury Prevention and Control</a>
<br><strong>Research Question: </strong> Various  <br>
<br>Data set : <b>cardeaths</b><HR>
063<h3>Highway Accidents</h3>
This Data set (Minitab), taken from an unpublished Masters thesis by Carl Hoffstedt and discussed in Weisberg, S. (1985) Applied Linear Regression, relates the automobile accident rate, in accidents per million vehicle miles, to 13 potential predictors. The data include 39 sections of large highways in the state of Minnesota in 1973. The variables are<br>
rate: accidents per million vehicle miles<br>
len: length of the segment in miles<br>
adt: average daily traffic count in thousands<br>
trks: truck volume as a percent of total traffic<br>
slim: speed limit<br>
lwid: lane width in feet<br>
shld: with in feed of outer shoulder<br>
itg: number of freeway-type interchanges per mile<br>
sigs: number of signalized interchanges per mile<br>
acpt: number of access points per mile<br>
lane: total number of traffic lanes in both directions<br>
fai: 1 if federal aid interstate highway, 0 otherwise<br>
pa: 1 if principal arterial highway, 0 otherwise<br>
ma: 1 if major arterial highway, 0 otherwise.<br>
<br><strong>Research Question: </strong> Find a model for predicting the accident rate  <br>
<br>Data set : <b>highways</b><HR>
064<h3>Old Faithful Guyser</h3>
The Old Faithful Geyser in Yellowstone National Park erupts every 35 to 120 minutes. 
The duration of each eruption lasts for 1.5 to 5 minutes. Notice that Old Faithful is not as faithful
 as one might expect. The time between eruptions and the length of each eruption varies quite a bit. 
 However, one can estimate the time of the next eruption quite accurately given the duration of the 
 previous eruption.<br>
The Data set set consists of the duration of eruption and 
time between eruptions for 272 different eruptions of Old Faithful taken over a
 number of days in August 1978 and August 1979. The times given are in minutes. 
<br><strong>Research Question: </strong> Find a predicition interval for the time until the 
next eruption based on the lengths of the last eruption  <br>
<br>Data set : <b>faithful</b><HR>
065<h3>Smoking and Job Type</h3>
Data summarizes a study of men in 25 occupational groups in England. Two indices are presented for each occupational group. The smoking index is the ratio of the average number of cigarettes smoked per day by men in the particular occupational group to the average number of cigarettes smoked per day by all men. The mortality index is the ratio of the rate of deaths from lung cancer among men in the particular occupational group to the rate of deaths from lung cancer among all men.
<br>Variables:
<br>1. Occupational_Group: Occupational Group
<br>2. Smoking: Smoking index (100 = average)
<br>3. Mortality: Lung cancer mortality index (100 = average) 
<br>Source: Occupational Mortality: The Registrar General's Decennial Supplement for England and Wales, 1970-1972, Her Majesty's Stationery Office, London, 1978.
<br><strong>Research Question: </strong> Study relationship of smoking and mortality   <br>
<br>Data set : <b>smokingandjob</b><HR>
066<h3>Cheese Tasting</h3>
As cheese ages, various chemical processes take place that determine the taste of the final product. This dataset contains concentrations of various chemicals in 30 samples of mature cheddar cheese, and a subjective measure of taste for each sample.<br>
Variable ids: <br>
Taste: Subjective taste test score, obtained by combining the scores of several tasters <br>
Acetic: concentration acetic acid 
H2S: concentration of hydrogen sulfide 
Lactic: Concentration of lactic acid 
<br><strong>Research Question: </strong> find a model for predcition taste  <br>
<br>Data set : <b>cheese</b><HR>
067<h3>Hotdogs</h3>
People who are concerned about their health may prefer hot dogs that are low in salt and calories. The datafile contains data on the sodium and calories contained in each of 54 major hot dog brands. The hot dogs are classified by type: beef, poultry, and meat (mostly pork and beef, but up to 15% poultry meat).
<br><strong>Research Question: </strong> How are Sodium and Type related to Calories?   <br>
<br>Data set : <b>hotdogs</b><HR>
068<h3>Homework or not?</h3>
Does assigning homework improve students performance? To study this a teacher of a basic Statistics 
course set up the following experiment. She taught three sections of the same course. In one she did 
not assign any homework, in the second she assigned homework but did not collect it and in the third 
the assigned and graded the homework. After the first exam she collected the exam scores.<BR>
<strong>Research Question: </strong> Is the kind of homework related to score?<br>
Data set (Minitab): <b><a href="http://academic.uprm.edu/wrolke/data/homework.MPJ">homework</a></b>
<br>Data set : <b></b><HR>
069<h3>Cat's Eyes</h3>
Eyes of species with highly developed eyes such as cats and man don't have their ganglion (eye-sight) cells evenly distributed over the surface of the retina but have a much greater concentation towards the center. In the early stages of fetal development, though, the distribution is much more uniform. This conforms with predictions made by the theory of evolution. In the Data set (Minitab) we have the area of the retina and the ratio of the number of cells in the center to the periphery. 
<br><strong>Research Question: </strong> Find a model for predicting cp.ratio  <br>
<br>Data set : <b>cateyes</b><HR>
070<h3>Lunatics in Masachusetts</h3>
The data are from an 1854 survey conducted by the Massachusetts Commission on Lunacy (Mental disorder) 
under the leadership of Edward Jarvis. Dr. Jarvis was President of the American Statistical Association 
from 1852 to 1882. 
<br><strong>Research Question: </strong>  Find a good model for predicting the percentage of lunatics. 
<br>Data set : <b>lunatics</b><HR>
071<h3>Brain Size and IQ</h3>
Willerman, Schultz, Rutledge and Bigler wondered whether the size of the brain of a person was related to the
 persons mental capacity. They selecteda sample of right-handed Anglo introductory psychology students who had 
 SAT scores higher than 1350. 
The subjects were administered the the Wechsler (1981) Adult Intelligence Scale-Revised to obtain IQ scores. 
The MRI scan, performed at the same facility, consists of 18 horizontal MR images. The computer counted all 
pixels with nonzero gray scale in each of the 18 images, and the total count served as an index for brain size.
<br><strong>Research Question: </strong>  Find a model for predicting IQ<BR>
<br>Data set : <b>brain size and iq</b><HR>
072<h3>PCB in Trout</h3>
Data on the concentration of polychlorinated biphenyl (PCB) residues in a series of lake trout from 
Cayuga Lake, NY, were reported in Bache et al (1972). The ages of the fish were accurately known,
 because the fish were annually stocked as yearlings and distinctly marked as to year class. Each 
 whole fish was mechanically chopped, ground, and thoroughly mixed, and 5-gram samples taken. The 
 samples were treated and PCB residues in parts per million (ppm) were estimated using column 
 chromatography.<br>
 <br><strong>Research Question: </strong> Find a model for predicting PCB <br>
Dataste: <strong><a href="http://academic.uprm.edu/wrolke/data/pcb in trout.MPJ">pcb in trout</a></strong>
<br>Data set : <b>pcb in trout</b><HR>
073<h3>Age by Gender in USA (Census 2000)</h3>
Breakdown of the population of USA by age and gender, according to the 2000 Census.
<br><strong>Research Question: </strong> <br> 
<br>Data set : <b>agesexUS</b><HR>
074<h3> Homefield Advantage in World Series </h3>
The World Series of baseball in the United States is a best-of-seven series. Therefore, the first team to win 
four games is the victor. To try to make the series fair, the first two games are played at one team's home park, 
the next three games are played at the other team's park (just two may be played if one team wins four in a row), 
and the final two games (if needed) are scheduled at the first team's park. It is therefore possible that one team 
will play four games in its home park while the other team may only play three games at home.<br>

It is generally assumed that there is some advantage to playing at home. Each baseball park is different, 
so there may be some advantage to playing on a familiar field. The hometown fans provide emotional support 
for the team, and so on. <br>

The dataset contains information on the year, the two teams competing in the world series, whether the 
American League (AL) or National League (NL) team won the game, and the AL and NL winning at home or away
 percentage.
<br><strong>Research Question: </strong> Is there an advantage to playing World Series games on your home field?
<br>Data set : <b>worldseries</b><HR>
075<h3> Acorn Size and Range  </h3>
Interest lies is the relationship between the size of the acorn and the geographic range of the oak tree species. 
Note that the Quercus tomentella Engelm species in the California region grows only on the Channel Islands 
(total area 1014 sq. km) and the island of Guadalupe (total area 265 sq. km). All other species grow on the 
Continental United States.
 <br><strong>Research Question: </strong> Find a model to predict the range
<br>Data set : <b>acorn</b><HR>
076<h3> Barley Yield </h3>
Effect of five different fertilizers on the yield of barley. The fertilizers are labeled 1 to 5. 
 <br><strong>Research Question: </strong> Is there an effect?
<br>Data set : <b>barley</b><HR>
077<h3> Survival on the Titanic </h3>
Numbers of men and women as well as crew and 3<sup>rd</sup> class passengers on the Titanic who died and who survived
 <br><strong>Research Question: </strong> Example of Simpon's paradox
<br>Data set : <b>titanic</b><HR>
078<h3> IQ and Brain Size </h3>
In another experiment designed to see whether there is a relationship between the size of the brain and 
intelligence Willerman et al. again selected a sample of students (see also #071). The subjects were administered the 
the Wechsler (1981) Adult Intelligence Scale-Revised to obtain IQ scores. In addition to the MRI scan 
they also recorded the height in inches and the weight in pounds of the students.
 <br><strong>Research Question: </strong> Does the size of the brain matter for the IQ score even when height wnd weight are taken into account?
<br>Data set : <b>iqandsize</b><HR>
079<h3> Seeding Rain Clouds </h3>
Results from an experiment to see whether seeding rain clouds works.
 <br><strong>Research Question: </strong> Does it?
<br>Data set : <b>clouds</b><HR>
080<h3> Birthweight </h3>
Effects of several factors on the birthweight of babies.
 <br><strong>Research Question: </strong>Does smoking matter?
<br>Data set : <b>birthweight</b><HR>
081<h3> Who drops a course?</h3>
Data on students who dropped a course.
<br><strong>Research Question: </strong>Any relationships?
<br>Data set : <b>dropcourse</b><HR>
082<h3> Galton's Height Data</h3>
Famous data on height of fathers and heightof sons
<br><strong>Research Question: </strong>Regression to the mean
<br>Data set : <b>galton</b><HR>
083<h3> Gestation Period and Life Expectancy in Animals</h3>
Data on the gestation period and the life expectancy in a number of animals
<br><strong>Research Question: </strong>Study the relationship
<br>Data set : <b>gestation</b><HR>
084<h3> Length of Lobster </h3>
Length of Lobster over time
<br><strong>Research Question: </strong> Find a model to predict the size of a lobster from their age
<br>Data set : <b>lobster</b><HR>
085<h3> Growing Rice</h3>
Number of rice corns for different types of fertilizers
<br><strong>Research Question: </strong>Is there a diffeence between the fertilizers?
<br>Data set : <b>rice</b><HR>
086<h3>Sales of Shoes </h3>
Shoe sales by year and type
<br><strong>Research Question: </strong>Find a good model for predicting the sales figures.
<br>Data set : <b>shoesales</b><HR>
087<h3> Handgun Ownership and Homicide Rates</h3>
Handgun Ownership and Homicide Rates for a number of countries
<br><strong>Research Question: </strong>Is there a relationship?
<br>Data set : <b>gunsandmurder</b><HR>
088<h3>Rates of AIDS in Americas (1995) </h3>
Data of the incidence of AIDS per 100,000 population in 1995 for the Americas as reported by the World Health Organization WHO. 
<br><strong>Research Question: </strong> Find averages, outliers etc.
<br>Data set : <b></b><HR>
089<h3>Babe Ruth's Homeruns </h3>
Number of homeruns hit by Babe Ruth while he was with the new York Yankees (1920 - 1934) 
<br><strong>Research Question: </strong> Find data summaries
<br>Data set : <b>babe</b><HR>
090<h3>Resting Period of Monarch Butterflies </h3>
Some Monarch butterflies fly early in the day, others somewhat later. After the flight they have to rest for a short
 period. It has been theorized that the resting period (RIP) of butterflies flying early in the morning is shorter 
 because this is a thermoregulatory mechanism, and it is cooler in the mornings. The mean RIP of all Monarch 
 butterflies is 133 sec. <br>
Research by Anson Lui, Resting period of early and late flying Monarch butterflies Danaeus plexippus, 1997
<br><strong>Research Question: </strong>Is the mean RIP for early-morning butterflies lower than 133 seconds?
<br>Data set : <b>butterflies</b><HR>
091<h3>Birthrates by State </h3>
Number of births, the overall birthrate and the teenage birthrate by state
<br><strong>Research Question: </strong>Various
<br>Data set : <b>birthrate</b><HR>
092<h3>Calcium and Blood Pressure </h3>
In a randomized comparative experiment researchers gave 10 black men a calcium supplement for 12 weeks. 
The control group of 11 black men received a placebo (there were also white men in this study but we will 
only consider the black men) The experiment was double-blind. The data is the seated systolic (heart contracted) 
blood pressure for all subjects before and after the 12 weeks. 
<br><strong>Research Question: </strong>Does calcium lower blood pressure?
<br>Data set : <b>calcium</b><HR>
093<h3> 10 Leading Causes of Death</h3>
Table with 10 leading causes of Death, by age in 2001. Source: National Center for Injury Prevention and Control
<br><strong>Research Question: </strong>None
<br>Data set : <b>causeofdeath</b><HR>
094<h3> Why do Companies Fail?</h3>
Survey of failed and healthy companies, and their dept to value ratios
<br><strong>Research Question: </strong>Is there a difference between failed and healthy companies and their ratios?
<br>Data set : <b>company</b><HR>
095<h3>Countries</h3>
Information on crowdedness, fertility and GDP for 57 Countries
<br><strong>Research Question: </strong>Simple Summaries
<br>Data set : <b>countries</b><HR>
096<h3> Treatment of Drug Addiction</h3>
Cocaine addiction is hard to break. Addicts need cocaine to feel any pleasure, so perhaps giving them an 
antidepressant drug will help. A 3 year study with 72 chronic cocaine users compared an antidepressant called 
desipramine with standard treatment for cocaine addiction (lithium) and a placebo. One third of the subjects 
chosen at random received each drug. After 3 years for each addict it was determined whether he/she was drug free
 or relapsed. The data, from D.M. Barnes, "Breaking the Cycle of Addiction", Science, 241 1988). 
<br><strong>Research Question: </strong>Does desipramine work as a treatment for cocaine addiction?
<br>Data set : <b>drugaddiction</b><HR>
097<h3>Item Baskets </h3>
In order to see whether there is a difference in the prices of foods 
at two local supermarkets researchers bought a basket of the same items at each of the two stores. 
<br><strong>Research Question: </strong>Are the prices different?
<br>Data set : <b>foods</b><HR>
098<h3> Friday 13<sup>th</sup></h3>
Is Friday the 13<sup>th</sup> an unusually unlucky day, or is this just superstition? How do superstitions affect 
people's behavior? These questions were addressed by researchers Scanlon, et al. (1993) in a study that examined 
the relationship between behavior and superstition in the United Kingdom. They analyzed shopping and traffic patterns, as well as the numbers and types of accidents that occurred on past Friday the 13th's. The study, conducted in England, focused on two questions: 1) How do superstitions regarding Friday the 13th affect human behavior?, and 2) Is Friday the 13th more unlucky than other Fridays? 
Scanlon, T.J., Luben, R.N., Scanlon, F.L., Singleton, N. (1993), "Is Friday the 13th Bad For Your Health?," BMJ, 
307, 1584-1586. <br>
Variable Names: <br>
1Dataset: Identifies source dataset (traffic, shopping, or accident) <br>
6th: Number of cars passing through junction (traffic dataset), shoppers for each supermarket (shopping dataset), or admissions due to transport accidents (accident dataset) on Friday the 6th <br>
13th: Number of cars passing through junction (traffic dataset), shoppers for each supermarket (shopping dataset), or admissions due to transport accidents (accident dataset) on Friday the 13th <br>
<br><strong>Research Question: </strong>Is  Friday 13<sup>th</sup> unlucky?
<br>Data set : <b>friday13</b><HR>
099<h3> Evaluating Instructors</h3>
A survey of business students at nine colleges in the United States was taken to determine the instructor behaviors that the students feel are more likely to contribute to their academic success. 215 undergraduate students enrolled in business classes were asked to list the instructor classroom behaviors they felt were important to their academic success. A questionnaire consisting of 51 instructor behaviors was studied. The data are for 735 students from nine business colleges randomly selected from the 1990/1991 AACSB Handbook. 

<br><strong>Research Question: </strong>How important are various factors?
<br>Data set : <b>instructor</b><HR>
100<h3>Olympic Men's Long Jump </h3>
Data on the gold medal winning performances in the men's long jump for the modern Olympic games.
<br><strong>Research Question: </strong>Estimate the winning jump in next Olympics
<br>Data set : <b>longjump</b><HR>
101<h3>Newcomb's Measurements of the Speed of Light</h3>
Simon Newcomb made a series of measurements of the speed of light between July and September 1882. 
He measured the time in seconds that a light signal took to pass from his laboratory on the Potomac River to a 
mirror at the base of the Washington Monument and back, a total distance of 7400m. His first measurement was 
0.000024828 seconds, or 24,828 nanoseconds (10<sup>9</sup> nanoseconds = 1 second). The data are the deviations 
(differences) from 24,800 nanoseconds. 
<br><strong>Research Question: </strong>Estimate the speed of light
<br>Data set : <b>newcomb</b><HR>
102<h3>Gender and Age of World Population</h3>
Gender and Age of World Population
<br><strong>Research Question: </strong>Various
<br>Data set : <b>pop1950x2010</b><HR>
103<h3>Popular Vote for President</h3>
Percentage of the popular vote won by the president from 1948 to 2004
<br><strong>Research Question: </strong>Summarize data
<br>Data set : <b>popularvote</b><HR>
104<h3>Demographic Information on World Populations</h3>
A number of demographic variables on the world population.
<br><strong>Research Question: </strong>Various
<br>Data set : <b>population</b><HR>
105<h3>Sleep Deprivation</h3>
Kelby Childers asked subjects to perform several tasks before and after 24 hours of sleep deprivation. 
One task involved the subjects lifting weights until muscle failure. The data is a count of the number of 
bench presses done before and after the 24 hours. (The Effect of Sleep Deprivation on Performance of a Gross 
and a Fine Motor Skill) 

<br><strong>Research Question: </strong>Does sleep deprivation effect bench pressing?
<br>Data set : <b>sleep</b><HR>
106<h3>Area and Population of Countries</h3>
Land area and population in 1980, 2000 and 2010 of 221 countries in the world
<br><strong>Research Question: </strong>Various
<br>Data set : <b></b><HR>
107<h3>Census Data for WR Inc.</h3>
WR Inc. is a large (ficticous) company. It recently did a survey of all its employees, asking them to fill out a 
questionnaire with questions regarding their gender, income etc. 
<br>a fake data set I made up because it is useful for illustrating a number of concepts
<br><strong>Research Question: </strong>Various
<br>Data set : <b>wrinccensus</b><HR>
108<h3>Sample Data for WR Inc.</h3>
Again about WR Inc. (see#107). In addition to the census they randomly selected 500 employees and asked them some additional questions.
<br><strong>Research Question: </strong>Various
<br>Data set : <b>wrincsample</b><HR>
109<h3>Survey of Students</h3>
Results of a survey of undergaduate students
<br><strong>Research Question: </strong>Various
<br>Data set : <b>classsurvey</b><HR>
110<h3>Scores on 2 Exams</h3>
<br><strong>Research Question: </strong>Do the scores differ?
<br>Data set : <b>examscores</b><HR>
111<h3>Moths</h3>
The number of moths found in traps, with different lures and the traps hung at different heights
<br><strong>Research Question: </strong>Does the number of moths cault depend on the type of lure and the height?
<br>Data set : <b>moths</b><HR>
112<h3>Survey of Students 2</h3>
<br><strong>Research Question: </strong>Various
<br>Data set : <b>studentsurvey</b><HR>
113<h3>Fermentation by Sugar Type</h3>
4 types of sugar were used in an experiment of fermenation, and the alcohol content was measured
<br><strong>Research Question: </strong>Is there a difference between the sugar types, and if so what is it?
<br>Data set : <b>sugar</b><HR>
114<h3></h3>
<br><strong>Research Question: </strong>
<HR >
115<h3></h3>
<br><strong>Research Question: </strong>
<HR >
116<h3></h3>
<br><strong>Research Question: </strong>
<HR >
117<h3></h3>
<br><strong>Research Question: </strong>
<HR >