Chapter 12.1, Problem 1CYU

Compute the expected value and the variance of the random variable $X$ with Table $2$ as its probability table.

Table $2$

$\begin{array}{ccccc}\text{value}\text{of}X& -1& 0& 1& 2\\ \text{probability}& \frac{1}{8}& \frac{1}{8}& \frac{3}{8}& \frac{3}{8}\end{array}$