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...

This chapter of the HyperStat Online Textbook discusses in detail sampling distributions of various statistics (mean, median, proportions, correlation, etc.), differences between such statistics, the Central Limit...

Created by Kyle Siegrist of the University of Alabama-Huntsville, this is an online, interactive lesson on random samples. The author provides examples, exercises, and applets concerning many different topics. Some of...

This applet allows you to explore the validity of confidence intervals on a proportion with various values for sample size (N) and population proportion (Pi). After you specify N, Pi, the level of confidence, and the...

This site, presented by the Department of Statistics at Yale University, gives an explanation of, a definition for and an example of sample means. Topics include mean, variance, distribution, and the central limit...