When calculating the unbiased estimator of the population standard deviation, we divide by _____ rather than _____ as we do with either $\sigma$ or S.
A) N - 2; N
B) N - 1; N
C) N; N - 1
D) N - 2; N - 1

Question

Quizplus · Accepted Answer

The unbiased estimator of the population standard deviation uses $N - 1$ in the denominator instead of $N$ to account for the degrees of freedom in the sample.

When Calculating the Unbiased Estimator of the Population Standard Deviation σ\sigmaσ

When Calculating the Unbiased Estimator of the Population Standard Deviation $\sigma$