NCSS 2021 SAMPLE SIZE

PASS software provides sample size tools for over 1030 statistical test and confidence interval scenarios – more than double the capability of any other sample size software. Each tool has been carefully validated with published articles and/or texts.

Get to know PASS by downloading a free trial, viewing the video to the right, or exploring this website.

PASS comes complete with integrated documentation and PhD statistician support.

PASS has been fine-tuned for over 20 years, and is now the leading sample size software choice for clinical trial, pharmaceutical, and other medical research. It has also become a mainstay in all other fields where sample size calculation or evaluation is needed.