A two-part course provided by the National Library of Medicine (NLM), which includes modules entitled "About Health Statistics" and "Finding Health Statistics".

"This page computes various statistics from a 2-by-2 table. It will calculate the Yates-corrected chi-square, the Mantel-Haenszel chi-square, the Fisher Exact Test, and other indices relevant to various special kinds of 2-by-2 tables."

"An online statistics book with links to other statistics resources on the web." A part of the Rice Virtual Lab in Statistics by David M. Lane.

A public-domain resource for "learning and teaching introductory statistics." Developed by David M. Lane in partnership with Rice University, University of Houston Clear Lake, and Tufts University.

"This online statistics dictionary takes the mystery out of statistical jargon. It includes all of the technical terms used on the Stat Trek website."