Datafiles



  • Depression_and_the_internet Download .TXT file Open in Data Desk ?
  • Methods: Correlation, Re-expression, Regression
  • Source: "Internet paradox. A social technology that reduces social involvement and psychological well-being?", Kraut R1, Patterson M, Lundmark V, Kiesler S, Mukopadhyay T, Scherlis W., Am Psychol. 1998 Sep;53(9):1017-31.
  • Number of Cases: 169
  • Excerpt: The September 1998 issue of the American T Psychologist published an article by Kraut et al. that reported on an experiment examining “the social and psychological impact of the Internet on 169 people in 73 households during their first 1 to 2 years online.” In the experiment, 73 households were offered free Internet access for […]


  • Designated_hitter_2012 Download .TXT file Open in Data Desk ?
  • Methods: Nonparametric Methods
  • Source: mlb.com
  • Number of Cases: 30
  • Excerpt: In the National league all players take a turn at bat. But in the American league, a “designated hitter” usually bats for the pitcher, who is likely not to be a strong batter. The theory is that a designated hitter will lead to more hits, more runs, and a higher-scoring game. The data give the […]


  • Dexterity Download .TXT file Open in Data Desk ?
  • Methods: Blocking, Paired Data
  • Source: The Functional Dexterity Test (FDT), measures the time it takes to place a series of cylinders into a set of holes. In one experiment researchers in Israel measured the time it took 93 children aged 5 to 18 complete the task using each hand. (We have converted their results, by taking the reciprocal of the time to obtain the children’s Speed in cylinders per second.)
  • Number of Cases: 93
  • Excerpt: personal communication




  • Diamonds Download .TXT file Open in Data Desk ?
  • Methods: Multiple Regression, Regression
  • Source: Data scraped from the web by Lou Valente of JMP
  • Number of Cases: 2690
  • Excerpt: Data on raw diamonds from the internet. Price of a diamond depends on its Carat weight, color, clarity, and cut. The data are for 2690 diamonds of a variety of weights, colors, clarity, and cut. What predicts the price? Do the variables need to be reexpressed?


  • Diet Download .TXT file Open in Data Desk ?
  • Methods: Inference
  • Source: unknown
  • Number of Cases: 51
  • Excerpt: Thirteen overweight women volunteered for a study to determine whether eating specially prepared crackers before a meal could help them lose weight. The subjects were randomly assigned to eat crackers with different types of fiber (bran fiber, gum fiber, both, and a control cracker) and cycled through several of the cracker alternatives. Unfortunately, some of […]






  • Dirt_bikes_2014 Download .TXT file Open in Data Desk ?
  • Methods: Indicator Variables, Multiple Regression, Outliers, Partial Regression Plots, Re-expression, Regression, Residuals
  • Source: Jiang Lu, Joseph B. Kadane, and Peter Boatwright,The Dirt on Bikes: An Illustration of CART Models for Brand Differentiation
  • Number of Cases: 114
  • Excerpt: Motorcycles designed to run off-road, often known as dirt bikes, are specialized vehicles. The dataset holds data on 114 many attributes of dirt bikes. Some cost as little as $1399, while others are substantially more expensive. One interest is in building a model to predict the price of a dirt bike from attributes of the […]


  • Disk_drives_2016 Download .TXT file Open in Data Desk ?
  • Methods: Correlation, Regression, Scatterplot
  • Source: https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=32+TB+hard+drive&rh=i%3Aaps%2Ck%3A32+TB+hard+drive
  • Number of Cases: 9
  • Excerpt: Disk drive capacity is often given in terabytes (TB), where 1 TB = 1000 gigabytes, or about a trillion bytes. A search of prices for external disk drives on Amazon.com in mid-2016 found the data on capacity and price.


  • Disk_drives_2020 Download .TXT file Open in Data Desk ?
  • Methods: Correlation, R-squared, Re-expression, Regression, Residuals, Scatterplot
  • Source: https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=32+TB+hard+drive&rh=i%3Aaps%2Ck%3A32+TB+hard+drive
  • Number of Cases: 13
  • Excerpt: Disk drive capacity is often given in terabytes (TB), where 1 TB = 1000 gigabytes, or about a trillion bytes. A search of prices for external disk drives on Amazon.com in mid-2016 found the data on capacity and price.