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GraphPad Prism is a powerful combination of biostatistics, curve fitting (nonlinear regression) and scientific graphing in one comprehensive program. Easily organize, analyze and graph repeated experiments; pick appropriate statistical tests and inte...

Web site for statistical computation; probability; linear correlation and regression; chi-square; t-procedures; t-tests; analysis of variance; ANOVA; analysis of covariance; ANCOVA; parametric; nonparametric; binomial; normal distribution; Poisson di...

Investopedia.com - Your Source For Investing Education. Includes the most comprehensive investing dictionary on the web as well as articles and tutorials on nearly any aspect of the market.

The University of Delaware, founded in 1743, offers over 100 academic majors; its distinguished faculty includes internationally known scientists, authors and teachers.

R Language Tutorial for SAS, SPSS, and Stata Users

Statsoft is the creator of STATISTICA, the most comprehensive suite of data mining and statistical analysis software.

Missouri University of Science and Technology, formerly the University of Missouri-Rolla, is one of the world

Definition of word from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.

A free online t-test calculator. Statsisitcs calculator computes p values for 1-tailed or 2-tailed t-tests. Performs the t-test for groups with equal variance, unequal variance, and matched groups (paired groups).