An estimator $\hat { \mu } _ { Y }$ of the population value $\mu _ { Y }$ is unbiased if
A) $\hat { \mu } _ { y } = \mu _ { y }$
B) $\bar { Y }$ has the smallest variance of all estimators.
C) $\bar { Y } \stackrel { p } { \rightarrow } \mu _ { y }$
D) $E \left( \hat { \mu } _ { Y } \right) = \mu _ { Y }$

Question

Quizplus · Accepted Answer

An estimator is unbiased if its expected value equals the true parameter value, i.e., $E(\hat{\mu}_Y) = \mu_Y$.

An Estimator μ^Y\hat { \mu } _ { Y }μ^​Y​ Of the Population Value

An Estimator $\hat { \mu } _ { Y }$ Of the Population Value