What's behind the graphic? See chapter 11 of Basic Business Statistics.
This page provides access to the data which accompany the casebooks:
The data is available in two formats. Either as JMP files or as plain text (TXT). The TXT files are tab delimited with missing values denoted by "NA". Here is alink to a zip file of all files in ".txt" format.
The following table provides links to the data on a class by class basis,
|Basic Business Statistics||Business Analysis Using Regression|
|Class by class||Class by class||Class by class||Class by class|