The sample standard deviation s is an unbiased estimator of the population standard deviation $\sigma$.

Name: The sample standard deviation s is an unbiased estimator of the population standard deviation $\sigma$.
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Quizplus · Accepted Answer

The sample standard deviation s is a biased estimator of the population standard deviation $\sigma$ when using the formula with $n-1$ in the denominator; however, this approach makes it a less biased estimator than if $n$ were used, especially for small sample sizes.

The Sample Standard Deviation S Is an Unbiased Estimator of the Population