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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"I've been in love with the earlier version of your program for years, but this one is really amazing."

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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.