The sample variance _____ the population variance across all possible samples of a given size.
A)underestimates
B)overestimates
C)equals
D)will either over- or underestimate (depending on the sample size.

Question

Quizplus · Accepted Answer

The sample variance underestimates the population variance because it divides by n instead of n-1, which is why we use the unbiased estimator dividing by n-1.

The Sample Variance _____ the Population Variance Across All Possible