Which of the following is not a property of variance?
A) The units of variance are the squares of the units of the original data.
B) The value of the variance is always positive or 0.
C) The sample variance is a biased estimator of the population variance.
D) The value of the variance is zero only when all of the data values are the same number.

Question

Quizplus · Accepted Answer

Variance, whether sample or population, is a measure of dispersion in a dataset. The statement that the sample variance is a biased estimator of the population variance is incorrect because the sample variance, when calculated with the denominator (n-1) instead of n, is an unbiased estimator of the population variance. This adjustment corrects for the bias in the estimation of the population variance from a sample.

Which of the Following Is Not a Property of Variance