Sample size determination for binomial test

Brief description

This web application is an implementation of sample size calculation methods for binomial test in JavaScript.

Threshold proportion ($p_0$) correspond to the null hypothesis.
Expected proportion ($p$) correspond to the alternative hypothesis.

Normal approximation: this application use the score-type standard error (i.e., standard error under $H_0$).

Exact test of a binomal porportion: This method can be computationally intensive. Please be careful.






  1. Agresti A. Categorical data analysis, 2nd ed. Wiley, 2002.
  2. Fleiss JL, Levin B, Paik MC. Statistical methods for rate and proportion, 3rd ed. Wiley, 2003.
  3. Johnson NL, Kemp AW, Kotz S. Univariate discrete distributions, 3rd ed. Wiley, 2005.

Update history

  • 2014/12/17 Added: English translation
  • 2012/7/17 Added: test release

To cite this page

  • Nagashima K. A sample size determination tool for the binomial test [Internet]. 2012 Jul 17 [cited 20XX YYY ZZ]; Available from: