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Suppose that X and Y are random variables such that E(X) = 4, E(Y) = 2 and var(X)

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Question;Suppose that X and Y are random variables such that E(X) = 4, E(Y) = 2 and var(X) = var(Y) = 4. Let Z=X+Y.Find E(Z) (1 dp)Assuming that X and Y are statistically independent find var(Z) (1 dp)Assuming that cov(X,Y) = 2 find var(Z) (1dp)

 

Paper#57455 | Written in 18-Jul-2015

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