Answer:
Let X be a random variable with the following probability distribution Value x of X P(X= x) -30 0.10 -20 0.15 -10 0.05 0 0.35 10 0.35 Complete the following. (If necessary, consult a list of formulas.) (a) Find the expectation E (X) of X. E(x) = 0 (b) Find the variance Var(x) of X. Var(x) = 0 Х ? Let X be a random variable with the following probability distribution. Value x of X P(X=x) 20 0.30 30 0.40 40 0.05 50 0.25 Complete the following. (If necessary, consult a list of formulas.) Х 2 (a) Find the expectation E(X) of X. E(x) = 0 (b) Find the variance Var(x) of x. Var(x) = 0 Let X be a random variable with the following probability distribution. Value x of X P(X=x) 3 0.35 4 0.20 5 0.30 6 0.05 7 0.05 00 0.05 Complete the following. (If necessary, consult a list of formulas.) ? (a) Find the expectation E (X) of X. E(x) = 0 (b) Find the variance Var(x) of X. Var(x)