This site, authored by David M. Lane of HyperStat Online, explains the relationship between hypothesis testing and confidence intervals. Because of the immense similarities between the two procedures many find them to be...

This applet lets you take "slices" through a multivariate data set to compare the distribution of a variable without regard for the values of the other variables with the distribution of that variable when the value of...

This site, created by Michelle Lacey of Yale University, gives an explanation, a definition and an example of correlation. Topics include correlation coefficient and r². This page is brief, but still provides a nice...

The applets, created by Virginia Tech's Department of Statistics, allow you to see how different bivariate data look under different correlation structures. The "Movie" applet either creates data for a particular...

This interactive lecture activity, created by Carolyn Cuff of Westminster College, motivates the need for sampling. "Why sample, why not just take a census?" Under time pressure, students count the number of times the...