Datafiles





  • 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.


  • DJIA_2017 Download .TXT file Open in Data Desk ?
  • Methods: Time Series Analysis, Normal model
  • Source: https://finance.yahoo.com/quote/%5EDJI/history/
  • Number of Cases: 2142
  • Excerpt: After the financial crisis of 2007/2008, the Dow jones Industrial Average (DJIA) bottomed out at 7278 on March 20, 2009. It then increased steadily, closing above 20,000 in early 2017. The data are daily statistics about the DJIA from 2009 to 2017.


  • Doctors_and_life_expectancy Download .TXT file Open in Data Desk ?
  • Methods: Correlation, Outliers, Re-expression, Regression, Residuals, Scatterplot
  • Source: unknown
  • Number of Cases: 40
  • Excerpt: Life expectancy at birth, TV’s per capita, and doctor’s per capita for countries of the world. Doctors predict life expectancy, but is that causal? TVs also predict life expectancy.




  • Doritos Download .TXT file Open in Data Desk ?
  • Methods: Confidence Intervals for Means, Hypothesis Tests, Hypothesis Tests for Means
  • Source: Unknown
  • Number of Cases: 6
  • Excerpt: Some students checked 6 bags of Doritos marked with a net weight of 28.3 grams. They carefully weighed the contents of each bag and recorded the weights in grams.


  • Dow_Jones_2015 Download .TXT file Open in Data Desk ?
  • Methods: Correlation, Re-expression, Regression
  • Source: finance.yahoo.com
  • Number of Cases: 44
  • Excerpt: The Dow Jones stock index measures the performance of the stocks of America’s largest companies. A regression of the Dow prices on years 1972–2015 appears to be successful, but the residuals raise some questions.