If the expected value of the sample statistic is equal to the population parameter being estimated, the sample statistic is said to
A)have low variability.
B)be an unbiased estimator of the population parameter.
C)have high precision.
D)be a random estimator of the population parameter.

Question

Quizplus · Accepted Answer

If the expected value of the sample statistic is equal to the population parameter being estimated, then the sample statistic is an unbiased estimator of the population parameter. "Unbiased" means that on average, the sample statistic will be equal to the population parameter. This is a desirable property in statistical inference, as it means that the sample statistic is not systematically overestimating or underestimating the population parameter.

If the Expected Value of the Sample Statistic Is Equal