Question: Consider again the situation of Exercise 4.78. It is required to find Var (eY). Use Theorems 4.2 and 4.3 and define Z = eY. Thus,

Consider again the situation of Exercise 4.78. It is required to find Var (eY). Use Theorems 4.2 and 4.3 and define Z = eY. Thus, use the conditions of Exercise 4.79 to find Var (Z) = E (Z2) – [E(Z)]2. Then do it by not using f(y) but rather use the first order Taylor series approximation to Var (eY). Comment!

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