Question: Prove the two-way rule for expectations, equation (2.2.5), which says E g(X) = E Y, where Y = g(X). Assume that g(x) is a monotone

Prove the "two-way" rule for expectations, equation (2.2.5), which says E g(X) = E Y, where Y = g(X). Assume that g(x) is a monotone function.

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