You Need to Adjust $S _ { \hat { u } } ^ { 2 }$

Multiple Choice

You need to adjust $S _ { \hat { u } } ^ { 2 }$ by the degrees of freedom to ensure that $s _ { \hat { u } } ^ { 2 }$ is

A) an unbiased estimator of $\sigma _ { u } ^ { 2 }$
B) a consistent estimator of $\sigma _ { u } ^ { 2 }$
C) efficient in small samples.
D) F -distributed.