Question: X1 is a random variable with E(X1) = 2, Var(x1) = 4 and X2 is a random variable with E(X2) = 1, Var(x) = 9.

X1 is a random variable with E(X1) = 2, Var(x1) = 4 and X2 is a random variable with E(X2) = 1, Var(x) = 9. Let Ybe a random variable such that Y = 3 X1 and let Z be a random variable such that Z-2X2. Let w be a random variable such that W=Y+Z. if X1 and X2 are independent random variables, answer the following questions (Stddev stands for Standard deviation): 1. E(Y)? 2. Var(Y)? 3. Stddev(V)? For Blank 3 4. E(Z)? 5. Var(z)? 6. Stddev(z)? 7. E(W)? 8. Var(W)? 9. Stddev(W)? (to 3 decimals)

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