Datafiles

  • Smoking_2018 Download .TXT file Open in Data Desk ?
  • Methods: Outliers, Re-expression, Regression, Residuals
  • Source: Gallup poll
  • Number of Cases: 56
  • Excerpt: The Gallup poll tracks cigarette smoking in the United States. How has the percentage of people who smoke changed since the danger became clear during the last half of the 20th century? The data give percentages of smokers as estimated by surveys, from 1944 through 2018.




  • Smoking_by_Age_and_Gender Download .TXT file Open in Data Desk ?
  • Methods: Conditional Distribution, Contingency Tables
  • Source: Possibly from the Pregnancy Risk Assessment Monitoring System, www.cdc.gov/prams/
  • Number of Cases: 12
  • Excerpt: The Centers for Disease Control and Prevention provide data on smoking rates by year and for men and women separately.


  • Social_networking Download .TXT file Open in Data Desk ?
  • Methods: Chi Square Tests
  • Source: Possibly from the Pregnancy Risk Assessment Monitoring System, www.cdc.gov/prams/
  • Number of Cases: 6
  • Excerpt: Pew Research conducted a survey about social networking in several countries. They asked whether respondents had access to and used social networking. Responses were “yes” (use social networking), “no”, and “not available”.


  • Some_birth_weights Download .TXT file Open in Data Desk ?
  • Methods:
  • Source: https://www.cdc.gov/nchs/data_access/vitalstatsonline.htm see also http://www.nber.org/natality/ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/DVS/natality/
  • Number of Cases: 394519
  • Excerpt: A 10% random sample of the weights of all live births in the U.S. in 1998.


  • Speed_and_density Download .TXT file Open in Data Desk ?
  • Methods: Regression
  • Source: unknown
  • Number of Cases: 10
  • Excerpt: The data report the density (cars per mile) and average speed of traffic on city highways. The data were collected at the same location at 10 different times randomly selected within a span of 3 months.


  • Sprouts Download .TXT file Open in Data Desk ?
  • Methods: Multifactor Analysis of Variance
  • Source: Student experiment
  • Number of Cases: 36
  • Excerpt: An experiment on mung beans was performed to investigate the environmental effects of salinity and water temperature on sprouting. Forty beans were randomly allocated to each of 36 petri dishes that were subject to one of four levels of Salinity (0, 4, 8, and 12 ppm) and one of three Temperatures (32°, 34°, or 36° […]


  • Stereograms Download .TXT file Open in Data Desk ?
  • Methods: Boxplots, Comparing Groups, Outliers, Re-expression, Test for Difference between Two Groups
  • Source: Real study - unknown source
  • Number of Cases: 78
  • Excerpt: Stereograms appear to be composed entirely of random dots. However, they contain separate images that a viewer can “fuse” into a three-dimensional (3D) image by staring at the dots while defocusing the eyes. An experiment was performed to determine whether knowledge of the embedded image affected the time required for subjects to fuse the images. […]


  • Stopping_distance Download .TXT file Open in Data Desk ?
  • Methods: Blocking, Comparing Two Groups, Paired Data
  • Source: unknown
  • Number of Cases: 10
  • Excerpt: A tire manufacturer tested the braking performance of one of its tire models on a test track. The company tried the tires on 10 different cars, recording the stopping distance for each car on both wet and dry pavement.


  • Stopping_distance_60 Download .TXT file Open in Data Desk ?
  • Methods: Blocking, Confidence Intervals for Means, Paired Data
  • Source: unknown
  • Number of Cases: 10
  • Excerpt: A tire manufacturer tested the braking performance of one of its tire models on a test track. The company tried the tires on 10 different cars, recording the stopping distance for each car on both wet and dry pavement from 60 miles per hour. The test was run on both dry and wet pavement. (The […]


  • Storks Download .TXT file Open in Data Desk ?
  • Methods: Correlation, Re-expression, Scatterplot
  • Source: Statistics for Experimenters, by Box, Hunter and Hunter.Originally from Ornithologische Monatsberichte,44, no. 2)
  • Number of Cases: 7
  • Excerpt: The number of storks in Oldenburg, Germany, plotted against the population of the town for 7 years in the 1930s. Do storks bring babies?


  • Streams Download .TXT file Open in Data Desk ?
  • Methods: Comparing Groups, Correlation, Data Display, Multiple Regression Inference, Re-expression, Regression, Regression Inference, Scatterplot, Summaries, Test for Difference between Two Groups
  • Source: unknown
  • Number of Cases: 172
  • Excerpt: As part of the course work, a class at an upstate NY college collects data on streams each year. Students record a number of biological, chemical, and physical variables, including the stream name, the substrate of the stream (limestone (L), shale (S), or mixed (M)), the pH, the temperature (C), and the BCI, a measure […]