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applied statistics 7 7. Suppose X and Y are the random variables with joint PMF given by: 11.2 5.75 -3 0 0.07 -2 0.2 0.08

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applied statistics

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7. Suppose X and Y are the random variables with joint PMF given by: 11.2 5.75 -3 0 0.07 -2 0.2 0.08 -1 0.1 0.1 0 0.15 0.1 0 0.28. Suppose X, Y and Z are independent random variables such that Find X Y Z var sd(X) sd(Y ) + sd( Z) (a) 3 (b) 1/var(Z) (c 1 (d) 2 (e) Impossible to determine

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