PASS Sample Size Software

PASS is a computer program for estimating sample size or determining the power of a statistical test or confidence interval. NCSS LLC is the company that produces PASS. NCSS LLC also produces NCSS (for statistical analysis).

PASS
Developer(s)NCSS, LLC
Stable release
PASS 15 / January 10, 2017; 7 years ago (2017-01-10)
Operating systemWindows
Typepower and sample size
LicenseProprietary software
Websitewww.ncss.com

PASS includes over 920 documented sample size and power procedures.

Major statistical topics in PASS

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  • Means - 1 or 2 Groups
  • Means - Correlated or Paired
  • Means - Cross-Over Designs
  • Means - Many (ANOVA)
  • Survival Analysis
  • Variances
  • ROC Curves
  • Equivalence
  • Normality Tests
  • Confidence Intervals
  • Conditional Power
  • Proportions - 1 or 2 Groups
  • Proportions - Correlated or Paired
  • Proportion - Many Groups
  • Mixed Models
  • Regression/Correlation
  • Non-Inferiority
  • Group Sequential Tests
  • Design of Experiments
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