# Unequal variance and sample size

What is the effect of sample size on variance? If n in two groups is different, does that automatically mean variance is not equal? Thanks

• The population variance has nothing to do with sample size.Sample size affects the accuracy of the estimate of variance. There is an F test that can be used to test equality of variances based on the assumption of independent normal distributions. – Michael Chernick Mar 14 '18 at 9:11