Question: 4. Let the joint pdf of (X, Y) be Are X and Y independent? otherwise b. d. What is the marginal distribution of X.

4. Let the joint pdf of (X, Y) be Are X and

4. Let the joint pdf of (X, Y) be Are X and Y independent? otherwise b. d. What is the marginal distribution of X. (give the name and the parameter(s)). Find > Y) Let Z = X + Y, find cov(X, Z), the covariance between X and Z.

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