Linear Regression: The Computer as a Teaching Tool

Computers and software can be used not only to analyze data, but also to illustrate essential statistical topics. Methods are shown for using software, particularly with graphics, to teach fundamental topics in linear regression, including underlying model, random error, influence, outliers, interpretation of multiple regression coefficients, and problems with nearly collinear variables. Systat 5.2 for Macintosh, a popular package, is used as the primary vehicle, although the methods shown can be accomplished with many other packages.