This site, created by the Department of Statistics at Yale University, gives an explanation, a definition and an example of chi-square goodness of fit test. Topics include chi-square test statistics, tests for discrete...

This glossary, created by M. Tevfik Dorka of the University of Newcastle, gives definitions for numerous statistical terms, concepts, methods, and rules. The list is extremely comprehensive. The author does more than...

Given a sample of N values of X randomly drawn from a normally distributed population, this program will calculate the .95 and .99 confidence intervals (CI) for the estimated mean of the population. Data entry is simple,...

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 online, interactive lesson on distributions provides examples, exercises, and applets which explore the basic types of probability distributions and the ways distributions can be defined using density functions,...