Download Free Trial Software

The free trial installation will install a copy of the program, a PDF copy of the manual, and a PDF quick start guide.

The evaluation runs for 10 days OR 10 trials, whichever comes first.
Opening/closing the program equals 1 trial.

To run the program on a Mac, a Windows emulator is necessary such as Parallels or Bootcamp. Using Wine or CrossOver is not recommended.

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"This software is great and the ease of use is amazing. I normally use [another program] and was prepared to spend hours...With your program I had the graphs in minutes and the graphs got it exactly right. An incredible effort. Thanks!!"

Ricardo Pietrobon - Director of Outcomes Research, Division of Orthopedic Surgery and Ambulatory Anesthesia, Duke University

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Power and Precision

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Power and Precision is a statistical power analysis software package for calculation of a sample size for a planned study. The program features an unusually clear interface, and many tools to assist the user in developing an understanding of power analysis.