In computing the mean of a sample, the value of ∑xi is divided by
A) n
B) n - 1
C) n + 1
D) n - 2

Question

Quizplus · Accepted Answer

In computing the mean of a sample, the value of ∑xi should be divided by the sample size (n). This is because the sample mean is an unbiased estimator of the population mean when dividing by n. Dividing by n - 1 (option B) is typically used in computing the sample variance, not the sample mean. Dividing by n + 1 (option C) and n - 2 (option D) are not commonly used in computing the sample mean.

In Computing the Mean of a Sample, the Value of ∑Xi