University of Colorado at Colorado Springs
Effect Size Calculators ©1998, 1999 Lee A. Becker. University of Colorado at Colorado Springs.
The web pages listed here comprise a powerful, conveniently-accessible, multi-platform statistical software package. There are also links to online statistics books, tutorials, downloadable software, and related resources that are all free.
StatSoft, Inc: Electronic Statistics Textbook
This Electronic Statistics Textbook offers training in the understanding and application of statistics. The material was developed at the StatSoft R&D department based on many years of teaching undergraduate and graduate statistics courses and covers a wide variety of applications, including laboratory research (biomedical, agricultural, etc.), business statistics and forecasting, social science statistics and survey research, data mining, engineering and quality control applications, and many others.