Computer-Assisted Statistics Teaching
A highly interactive online textbook that contains animations, simulations and other dynamic displays and delivers training in a computer-based, data centered approach. It's free now but you have to register. From CAST.
Defense Acquisition University Stat Refresher
A tutorial covering basic probability, random variables, expectations, moments, distributions, data analysis including regression (linear and multiple), moving averages, exponential smoothing, and clustering. Designed for the Defense Acquisition University by the Center for the New Engineer, George Mason University.
Electronic Statistics Textbook
An introductory level online statistics textbook including descriptions of power, factorial ANOVA, between and within-subjects ANOVA, chi-square and distribution-free tests. From David M. Lane.
HipEstat
Que pasa? Anyone that speaks spanish - let us know if this online textbook in Spanish is useful. From ACDE, Ediciones.
NIST Engineering Statistics Handbook
Even though this is aimed at Engineering, non-engineers will also find quite a bit of useful material in the Handbook. The Handbook covers a great many topics in statistics that will be useful to Six Sigma practitioners and other improvement professionals. From NIST.
Statistics Every Writer Should Know
A series of very user friendly beginning tutorials on statistics, suitable for school students as well as non-mathematics undergraduates. From RobertNiles.com.
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