An unbiased estimator of a population parameter is defined as:
A)an estimator whose expected value is equal to the parameter.
B)an estimator whose variance is equal to one.
C)an estimator whose expected value is equal to zero.
D)an estimator whose variance goes to zero as the sample size goes to infinity.

Question

Quizplus · Accepted Answer

An unbiased estimator is one whose expected value is equal to the parameter being estimated. This means that, on average, the estimator will produce an estimate that is exactly equal to the true value of the parameter. This is the most desirable property for an estimator to have.

An Unbiased Estimator of a Population Parameter Is Defined As