If a population is known to be normally distributed,then it follows that the sample standard deviation s must equal the population standard deviation $\sigma$.

Question

Quizplus · Accepted Answer

The sample standard deviation $s$ is an estimate of the population standard deviation $\sigma$, but it does not necessarily equal $\sigma$. The estimate can vary from sample to sample.

If a Population Is Known to Be Normally Distributed,then It σ\sigmaσ

If a Population Is Known to Be Normally Distributed,then It $\sigma$