An estimator is efficient if it
A)has the smallest variance of all unbiased estimators.
B)has a p-value is less than .05.
C)has a small standard error.
D)has the smallest mean squared error.

Question

Quizplus · Accepted Answer

An estimator is considered efficient if it has the smallest variance among all unbiased estimators. This is a key property in the theory of estimation, indicating that the estimator uses the data most effectively to estimate the parameter.

An Estimator Is Efficient If It