Question: Let x and y denote two random variables. Suppose you have the following data: State i Pi Xi yi 0.4 N 0 1=2 0.2 e

Let x and y denote two random variables. Suppose you have

Let x and y denote two random variables. Suppose you have the following data: State i Pi Xi yi 0.4 N 0 1=2 0.2 e -2 i = 3 0.4 -1 1 Let z = x - y so that Ez = Ex - Ey. Find Ez

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