PASS provides sample size calculations for over 370 more scenarios than any other sample size software and is the premier software tool for determining the needed sample size or analyzing the power of a study. PASS is used extensively in clinical trial planning, grant proposals, pharmaceutical research, statistical and biostatistical consulting, health research, and many other areas of study planning and study evaluation.

NCSS software provides a complete and easy-to-use collection of hundreds of statistical and graphics tools to analyze and visualize your data.N CSS software for data analysis comes complete with integrated documentation, free training videos, and full phone and email support from a team of PhD statisticians.