Question: 7.38. Suppose that the two-dimensional random variable (X, Y) has pdf given by f(x, y) = ke-, = 0, 0 < x < y <

7.38. Suppose that the two-dimensional random variable (X, Y) has pdf given by f(x, y) = ke-, = 0, 0 < x < y < 1 elsewhere. (See Fig. 7.18.) Find the correlation coefficient pzy.

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