Statisticians have determined that the sample variance is a(n)_____ estimator of the population variance in that it _____ the population variance across all possible random samples of a given size.
A)unbiased;accurately estimates
B)unbiased;overestimates
C)biased;overestimates
D)biased;underestimates

Question

Quizplus · Accepted Answer

The sample variance is a biased estimator of the population variance because it tends to underestimate the population variance when using the formula with n in the denominator instead of n-1.

Statisticians Have Determined That the Sample Variance Is A(n)_____ Estimator