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Problem Set due Jun 29, 2021 16:59 MST Problem 6. Correlation coefficients 3 points possible (graded) Consider random variables X, Y and Z, which are
Problem Set due Jun 29, 2021 16:59 MST Problem 6. Correlation coefficients 3 points possible (graded) Consider random variables X, Y and Z, which are assumed to be pairwise uncorrelated (i.e., X and Y are uncorrelated, X and Z are uncorrelated, and Y and Z are uncorrelated). Suppose that . E[X] = E [Y] = E [Z] = 0, . E [X2] = E [Y2] = E [Z2] = 1, Find the correlation coefficients p (X - Y, X + Y), p(X + Y, Y + Z), and p (X, Y + z). 1 . p ( X - Y , X + Y ) = 2 . p ( X + Y , Y + z ) = 3. p ( X , Y + Z ) =
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