Question: Let X be a random variable with the following probability distribution. Value x of X P (X=x) -2 0.40 - 1 0.30 0 0.05 1

Let X be a random variable with the following probability distribution. Value x of X P (X=x) -2 0.40 - 1 0.30 0 0.05 1 0.20 2 0.05 Complete the following. (If necessary, consult a list of formulas.) (a) Find the expectation E (X) of X. E(X) = 1 X 5 (b) Find the variance Var(X) of X. var (X) = 1

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