The sample variance is an unbiased estimator of the population variance
A) when dividing SS by n.
B) when dividing SS by df.
C) when dividing SS by n - 1.
D) when dividing SS by df and when dividing SS by n - 1.

Question

Quizplus · Accepted Answer

The sample variance is an unbiased estimator of the population variance when dividing the sum of squares (SS) by the degrees of freedom (df), which is n - 1 for a sample variance calculation. This adjustment corrects the bias in the estimation of the population variance from a sample.

The Sample Variance Is an Unbiased Estimator of the Population