(a) Compute E(x), the expected value of x. The expected value of a random variable is a measure for the central location. Thus, the expected value of a random variable is another way to refer to the mean, . Recall the formula the expected value, E(X), of a discrete random variable x. Multiply each value of the random variable by its respective probability and then sum these values. Step 1 It can be helpful to add a column to the given table of information to organize the products of xf(x). Complete the table. x X 4 E(x) = xf(x) f(x) xf(x) 0.25 4(0.25)= 8 0.50 12 0.25 Thus, E(x) = E(x) = xf(x) =