chi square sample size calculator

one varaince test tutorial

χ² distribution

Normal distribution left tailed Normal distribution two tailed Normal distribution right tailed

Test calculation

Calculate the sample size for a right tail chi-square test

Statistic Data

α: significant level (0-1), maximum chance allowed rejecting H0 while H0 is correct (Type1 Error)
power required test power
effect size(w) 0.1 small, 0.3 medium, 0.5 large
df: degrees of freedom

validation message