Datafiles

  • Marriage_age_2017 Download .TXT file Open in Data Desk ?
  • Methods: Regression
  • Source: https://www.census.gov/data/tables/time-series/demo/families/marital.html
  • Number of Cases: 78
  • Excerpt: The estimated median age at fist marriage by sex from 1890 to 2017 is provided by the U.S. Census bureau. Since 1960, marriage ages have been increasing steadily. Has the difference between men’s and women’s first marriage age changed?


  • Marriage_age_2019 Download .TXT file Open in Data Desk ?
  • Methods: Multiple Regression Inference, Outliers, Re-expression, Regression, Regression Inference, Residuals
  • Source: https://www.census.gov/data/tables/time-series/demo/families/marital.html
  • Number of Cases: 79
  • Excerpt: The estimated median age at fist marriage by sex from 1890 to 2017 is provided by the U.S. Census bureau. Since 1960, marriage ages have been increasing steadily. Has the difference between men’s and women’s first marriage age changed?




  • Math_scores_2019 Download .TXT file Open in Data Desk ?
  • Methods: Boxplots, Center, Display Quantitative Variable, Displaying Quantitative Data, Shape, Spread, Summaries, Summarizing Quantitative Data
  • Source: https://www.nationsreportcard.gov/profiles/stateprofile?chort=2&sub=MAT&sj=AL&sfj=NP&st=MN&year=2019R3
  • Number of Cases: 52
  • Excerpt: The National Center for Education Statistic reports average mathematics achievement scores for eighth graders in all 50 states.


  • Maze Download .TXT file Open in Data Desk ?
  • Methods: Confidence Intervals for Means, Hypothesis Tests, Hypothesis Tests for Means
  • Source: Unknown
  • Number of Cases: 21
  • Excerpt: Psychology experiments sometimes involve testing the ability of rats to navigate mazes. The mazes are classified according to difficulty, as measured by the mean length of time it takes rats to find the food at the end. One researcher needed a maze that will take rats an average of about one minute to solve. He […]


  • Mazes_and_smells Download .TXT file Open in Data Desk ?
  • Methods: Inference
  • Source: A. R. Hirsch and L. H. Johnston, “Odors and Learning.” Chicago: Smell and Taste Treatment and Research Foundation
  • Number of Cases: 21
  • Excerpt: Can pleasant smells improve learning? Researchers timed 21 subjects as they tried to complete paper-and-pencil mazes. Each subject attempted a maze both with and without the presence of a floral aroma. Subjects were randomized with respect to whether they did the scented trial first or second. Is there any evidence that the floral scent improved […]


  • Memory Download .TXT file Open in Data Desk ?
  • Methods: Comparing Groups, Comparing Two Groups, Test for Difference between Two Groups
  • Source: Solomon,P.R., Adams,F., Silver, A., Zimmer, J. and De Veaux, R.D. Journal of the American Medical Assocation Vol. 288 pp.835-840 (2002), “Ginkgo for Memory Enhancement A Randomized Controlled Trial”
  • Number of Cases: 104
  • Excerpt: In an experiment to test ginkgo bloba, subjectswere assigned randomly to take ginkgo biloba supplements or a placebo. Their memory was tested to see whether it improved.




  • Mens_Weights Download .TXT file Open in Data Desk ?
  • Methods: Normal Probability Plots, Normal model, Standard Deviation
  • Source: www.cdc.gov/nchs/nhanes.htm
  • Number of Cases: 80
  • Excerpt: Since the 1960s, the Centers for Disease Control and Prevention’s National Center for Health Statistics has been collecting health and nutritional information on people of all ages and backgrounds. The National Health and Nutrition Examination Survey (NHANES) of 2001–2002, measured a wide variety of variables, including body measurements, cardiovascular fitness, blood chemistry, and demographic information […]


  • Michelson Download .TXT file Open in Data Desk ?
  • Methods: Confidence Intervals for Means
  • Source: Stigler, Stephen M. (1977). Do Robust Estimators Workwith Real Data? The Annals of Statistics 5:4, 1075. Used by permission.
  • Number of Cases: 100
  • Excerpt: In 1879, A. A. Michelson made 100 determinations of the velocity of light in air using a modification of a method proposed by the French physicist Foucault. The data are given here as reported by Stigler. The measurements are derived from sets of often widely disparate numbers of observations. The numbers are in km/sec, and […]