The Expected Value of the Sampling Distribution of the Sample $\bar { X }$

Short Answer

The expected value of the sampling distribution of the sample mean $\bar { X }$ equals the population mean $\mu$ : $\begin{array}{|l|l|}\hline A&\text { when the population is normally distributed.}\\\hline B&\text {when the population is symmetric. }\\\hline C&\text {when the population size \( N>30 \). }\\\hline D&\text { for all populations.}\\\hline \end{array}$