The Sampling Distribution of the Sample Mean Is Shown Below

Multiple Choice

The sampling distribution of the sample mean is shown below. $$\begin{array} { c | c c c c c } \bar { x } & 4 & 5 & 6 & 7 & 8 \\\hline \mathrm { p } ( \bar { x } ) & 1 / 9 & 2 / 9 & 3 / 9 & 2 / 9 & 1 / 9\end{array}$$ Find the expected value of the sampling distribution of the sample mean.

A) 5
B) 4
C) 6
D) 7