We use N - 1 in the denominator of the equation for calculating the sample standard deviation because it provides us with an accurate estimate of the population standard deviation.

Question

Quizplus · Accepted Answer

Using N - 1 (where N is the sample size) in the denominator corrects for the bias in the estimation of the population variance and standard deviation from a sample, making the estimate more accurate. This is known as Bessel's correction.

We Use N - 1 in the Denominator of the Equation