Software

PASS software is used by researchers to determine the sample size needed for a study involving a statistical test or confidence interval. It may also be used to analyze the statistical power of a study.

PASS can be used to analyze sample size for over 1100 statistical test and confidence interval scenarios. PASS comes with PhD statistician support, as well as complete documentation with examples and validation of every procedure.

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The NCSS statistical analysis and graphics application provides hundreds of statistical tools to analyze and visualize your data. It has been fine-tuned and developed for over 30 years. NCSS can import all the major data types, and filters and transformations are easy to apply.

You can quickly get to know NCSS by watching the product information and training videos, or you can download a 30-day trial, or view the website materials and documentation.

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"PASS is a great program. It does so much and is easy to use. It’s much better than the other sample size programs I’ve used—it has helped me greatly in my research."

Ken Lawson, Ph.D., The University of Texas

"I have used NCSS since it was NCSS 2000. Absolutely love it."

Dr. William Kennedy, Consultant