In the equations for the sample standard deviation and variance, why is there an "n-1" in the denominator of the equations?

Question

Quizplus · Accepted Answer

The "n-1" in the denominator of the sample standard deviation and variance equations is used to correct for the bias in the estimation of the population variance and standard deviation from a sample. This adjustment, known as Bessel's correction, ensures that the sample variance is an unbiased estimator of the population variance, particularly important in smaller sample sizes.

In the Equations for the Sample Standard Deviation and Variance