Mathematics

27 November, 09:53

Let the joint pmf of X and Y be f (x, y) = 1/4, (x, y) ∈S={ (0,0), (1,1), (1,-1), (2,0) }. (a) Are X and Y independent? (b) Calculate Cov (X, Y) andrho. This exercise also illustrates the fact that dependent random variables can have a correlation coefficient of zero

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