University of California, Berkeley: Philip Stark's SticiGui: "Chapter 9: Regression"
Read this chapter to learn how to analyze X and Y data, where the X variable is considered the independent variable and Y the dependent variable. Regression analysis is used to determine how the X values affect the Y values by assuming that there is a linear relationship between them. There are several exercises and Java applets embedded in the text that are meant to further reinforce your learning. Do not skip these exercises! For instructions on how to navigate these exercises, see "Special Instructions on SticiGui Exercises and Java Applets” in the "Course Information” section above.