Power and Precision Manuals
"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
Power and Precision
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.