PASS
Power Analysis and Sample Size

PASS is the best power analysis and sample size tool on the market. No other sample size program covers as many statistical procedures.

PASS 2008 Upgrade
Now Available
A new addition of PASS that adds over 40 new procedures and features is now available. Upgrade to PASS 2008 now!

NCSS
Statistical Analysis and Graphics

NCSS is a comprehensive, accurate, and easy-to-learn statistical analysis and graphics system for Windows.

NCSS 2007 Upgrade
Now Available
NCSS 2007 adds several new statistical procedures and tools, including mixed models, macros, and a spectacular color selection tool. With redesigned input screens, NCSS 2007 is easier to use than ever before. Upgrade to NCSS 2007 now!

GESS is our new comprehensive package for statistical analysis of microarray gene expression data.

Statistical procedures include repeated measures ANOVA, GLM ANOVA, Cox Regression, Multiple Regression and Logistic Regression. Click here for more details.