StatCrunch logo (home)

Data sets shared by StatCrunch members
Showing 1 to 15 of 42 data sets matching computer
Data Set/Description Owner Last edited Size Views
Treatment Effects of a Drug on Cognitive Functioning in Children with Mental Retardation and ADHD
Research conducted by: Pearson et al. Case study prepared by: David Lane and Emily Zitek Overview This study investigated the cognitive effects of stimulant medication in children with mental retardation and Attention-Deficit/Hyperactivity Disorder. This case study shows the data for the Delay of Gratification (DOG) task. Children were given various dosages of a drug, methylphenidate (MPH) and then completed this task as part of a larger battery of tests. The order of doses was counterbalanced so that each dose appeared equally often in each position. For example, six children received the lowest dose first, six received it second, etc. The children were on each dose one week before testing. This task, adapted from the preschool delay task of the Gordon Diagnostic System (Gordon, 1983), measures the ability to suppress or delay impulsive behavioral responses. Children were told that a star would appear on the computer screen if they waited long enough to press a response key. If a child responded sooner in less than four seconds after their previous response, they did not earn a star, and the 4-second counter restarted. The DOG differentiates children with and without ADHD of normal intelligence (e.g., Mayes et al., 2001), and is sensitive to MPH treatment in these children (Hall & Kataria, 1992). Questions to Answer Does higher dosage lead to higher cognitive performance (measured by the number of correct responses to the DOG task)? Design Issues This is a repeated-measures design because each participant performed the task after each dosage. Variable Description Placebo: Number of correct responses after taking a placebo d15 Number of correct responses after taking .15 mg/kg of the drug d30 Number of correct responses after taking .30 mg/kg of the drug d60 Number of correct responses after taking .60 mg/kg of the drug
kari.taylorOct 22, 2014434B1476
YMS Table 3-3 Brain Size vrs IQ
Brain size as measured by magnetic resonance imaging (number of pixels in the computer image of the brain scan).. verses intelligence as measured by Wechsler Adult Intelligence Test. 20 volunteers of each gender
lakestatsSep 27, 20071KB731
The Mac Attack
This data contains the monthly market share percentage for both Windows and Mac computers from February 2006 to January 2008. Close examination of the data shows the Windows market share is on the decline while the Mac market share is increasing.
websterwestFeb 21, 20084KB510
Dell stock price
These are historical stock prices for Dell Computer. Open is the price at the start of trading. High and Low are the highest and lowest points the price reached during the trading day. Close is the price at the end of trading. Volume is the number of shares of Dell stock traded that day.
adaviesOct 3, 2010230KB423
Responses to Laptop survey
A recent survey asked respondents whether or not they owned a laptop computer. It also asked how they received the laptop (purchase, a gift, etc), their gender, and whether or not they are a student.

Check out the original survey here: http://www.statcrunch.com/5.0/survey.php?surveyid=1231&code=BJBHU&groupid=256

Feel free to copy it for your own use.

scsurveyJan 28, 201119KB419
2005 Apple Computer Daily Returns
This is Apple Computer Stock market data for the 2005. The returns are the daily returns expressed as a percentage.
craig_slinkmanSep 6, 201116KB463
NIST Longley Regresson Test Data Set
Longley, J. W. (1967). An Appraisal of Least Squares Programs for the Electronic Computer from the Viewpoint of the User. Journal of the American Statistical Association, 62, pp. 819-841.
craig_slinkmanMar 18, 2010665B92
Body Dimensions
NAME: Exploring Relationships in Body Dimensions TYPE: Observational SIZE: 507 Observations, 25 Variables DESCRIPTIVE ABSTRACT: This dataset contains 21 body dimension measurements as well as age, weight, height, and gender on 507 individuals. The 247 men and 260 women were primarily individuals in their twenties and thirties, with a scattering of older men and women, all exercising several hours a week. SOURCE: Measurements were initially taken by the first two authors - Grete Heinz and Louis J. Peterson - at San Jose State University and at the U.S. Naval Postgraduate School in Monterey, California. Later, measurements were taken at dozens of California health and fitness clubs by technicians under the supervision of one of these authors. VARIABLE DESCRIPTIONS: Columns Variable Skeletal Measurements: 1 - 4 Biacromial diameter (see Fig. 2) 6 - 9 Biiliac diameter, or "pelvic breadth" (see Fig. 2) 11 - 14 Bitrochanteric diameter (see Fig. 2) 16 - 19 Chest depth between spine and sternum at nipple level, mid-expiration 21 - 24 Chest diameter at nipple level, mid-expiration 26 - 29 Elbow diameter, sum of two elbows 31 - 34 Wrist diameter, sum of two wrists 36 - 39 Knee diameter, sum of two knees 41 - 44 Ankle diameter, sum of two ankles Girth Measurements: 46 - 50 Shoulder girth over deltoid muscles 52 - 56 Chest girth, nipple line in males and just above breast tissue in females, mid-expiration 58 - 62 Waist girth, narrowest part of torso below the rib cage, average of contracted and relaxed position 64 - 68 Navel (or "Abdominal") girth at umbilicus and iliac crest, iliac crest as a landmark 70 - 74 Hip girth at level of bitrochanteric diameter 76 - 79 Thigh girth below gluteal fold, average of right and left girths 81 - 84 Bicep girth, flexed, average of right and left girths 86 - 89 Forearm girth, extended, palm up, average of right and left girths 91 - 94 Knee girth over patella, slightly flexed position, average of right and left girths 96 - 99 Calf maximum girth, average of right and left girths 101 -104 Ankle minimum girth, average of right and left girths 106 -109 Wrist minimum girth, average of right and left girths Other Measurements: 111-114 Age (years) 116-120 Weight (kg) 122-126 Height (cm) 128 Gender (1 - male, 0 - female) The first 21 variables are all measured in centimeters (cm). Values are separated by blanks. There are no missing values. STORY BEHIND THE DATA: The first two authors investigated the correspondence between frame size, girths, and weight of physically active young men and women, most of whom were within normal weight range. One goal of this investigation was to develop predictive techniques to assess the lean/fat body composition of individuals. PEDAGOGICAL NOTES: These data can be used to provide statistics students practice in the art of data analysis. Such analyses range from simple descriptive displays to more complicated multivariate analyses such as multiple regression and discriminant analysis. SUBMITTED BY: Grete Heinz 24710 Upper Trail Carmel, CA 93923 USA goguh@aol.com Louis J. Peterson Department of Health Sciences San José State University One Washington Square San José, California 95192 USA Roger W. Johnson Department of Mathematics and Computer Science South Dakota School of Mines and Technology 501 East St. Joseph Street Rapid City, South Dakota 57701 USA Roger.Johnson@sdsmt.edu Carter J. Kerk Industrial Engineering Program South Dakota School of Mines and Technology 501 East St. Joseph Street Rapid City, South Dakota 57701 USA Carter.Kerk@sdsmt.edu --
hancocdMar 19, 20178KB945
Survey results - group 2.xls
groups 2 data results - computer usage survey
efierkeJan 27, 201416KB520
Body Measurements
Lists estimates of the percentage of body fat determined by underwater weighing and various body circumference measurements for 252 men. Author: Roger W. Johnson Department of Mathematics & Computer Science South Dakota School of Mines & Technology 501 East St. Joseph Street Rapid City, SD 57701 email address: rwjohnso@silver.sdsmt.edu web address: http://silver.sdsmt.edu/~rwjohnso
ds-12%scAug 11, 200830KB494
Shock Data
NOTE: These data appear and are utilized in "Statistical Analysis: A Computer Oriented Approach" by A.A. Afifi and S.P. Azen. DESCRIPTIVE ABSTRACT: SOURCE: These data were collected at the Shock Research Unit at the University of Southern California, Los Angeles, California. Data on many physiological variables were collected successively in time on each patient. These data represent a special subset of the data that was extracted for the purpose of exercise. Initial measurements (measurements upon admission) and final measurements on the same variables (measurements just before death or discharge) were collected on 113 critically ill patients. CODE-SHEET TABLE: Please note that there are 2 records for each patient. Each record contains 21 fields. Record 1 contains 6 general variables (Id - Shock type) and 14 initial measurements on 14 variables (Systolic pressure - Hematocrit). Record 2 contains the same 6 general variables and 14 final measurements on the 14 variables. Each record also has a record number indicator. Column Variable Units Comment -------------------------------------------------------------------------- 1-4 ID none 5-8 Age yr 9-12 Height cm 13-15 Sex none 1=Male, 2=Female 16 Survival none 1=Survived, 3=Died 17-20 Shock type none 2=Non-shock 3=Hypovolemic shock 4=Cardiogenic shock 5=Bacterial shock 6=Neurogenic shock 7=Other 21-24 Systolic Pressure mm Hg 25-28 Mean arterial pressure mm Hg 29-32 Heart rate beats/min 33-36 Diastolic pressure mm Hg 37-40 Mean central venous Pressure cm H2O 41-44 Body surface index m2 45-48 Cardiac index liters/min m2 49-52 Appearance time sec 53-56 Mean circulation time sec 57-60 Urinary output ml/hr 61-64 Plasma volume index ml/kg 65-68 Red Cell Index ml/kg 69-72 Hemoglobin gm/100 ml 73-76 Hematocrit percent 77-79 Blank 80 Card sequence (Record) none 1=Initial, 2=Final
ds-12%scAug 11, 200818KB434
Shock.xlsx
This data set contains data collected on 113 patients who were treated for shock by the Shock Research Unit at the University of Southern California, Los Angeles, California. The data set used here contains only the measurements made at the time the patient was admitted. The data set was published in A.A. Afifi, S.P. Azen, Statistical Analysis: A Computer Oriented Approach, 2nd edition, 1979, Academic Press, New York.
anderson_instructorJan 1, 20158KB192
MATH138 PROJECT1 MALTMAN TRACKBALL (WIRED) PRICE DATA
Trackball mice prices for a sample of products offered on Amazon 6/22/2011 for trackball mice that use a wire to connect to the computer.
maltman1524Jul 11, 2011192B35
MATH138 PROJECT1 MALTMAN TRACKBALL (WIRED) AVG CUSTOMER SATISFACTION RATING (# OF STARS)
Trackball mice average customer satisfaction ratings for a sample of products offered on Amazon 6/22/2011 for trackball mice that use a wire to connect to the computer.
maltman1524Jul 11, 2011177B35
STAT 509 class data
Real data collected from students taking STAT 509 (Statistics for Engineers and Scientists) at the University of South Carolina. A * indicates a missing (unavailable) observation.
ColumnDescription
shoeshoe size
gender(0 = Male, 1 = Female)
state(0 = out of state, 1= in state)
field 1 = computer science / information systems
2 = math
3 = engineering
4 = other
majorUSC code for major
heartheartbeat (per minute)
sampleuserMay 25, 2007580B184

1 2 3   >

Always Learning