An Unbiased Estimator Is

Multiple Choice

An unbiased estimator is:

A) any sample statistic used to approximate a population parameter
B) a sample statistic, which has an expected value equal to the value of the population parameter
C) a sample statistic whose value is usually less than the value of the population parameter
D) a sample statistic whose value is usually greater than the value of the population parameter
E) any estimator whose standard error is relatively small