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4. Suppose X ~ N(1,3' ), Y ~ N(0,47 ), PxY Let Z - LZ (1) Find E(Z). (2) Find D(Z) . (3) Find p

4. Suppose X ~ N(1,3' ), Y ~ N(0,47 ), PxY Let Z - LZ (1) Find E(Z). (2) Find D(Z) . (3) Find p . (20 points)

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