SOLVED: The conditional variance of X, given Y, is defined by Var(X| Y) = E[(X E[XI YI) Y]Prove the conditional variance formula, namely,Var(X ) E[Var(X| Y)] Var(E[XI YI)Use this to obtain Var(X) in Example 1 S(B) and check your result by differentiating the generating function
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SOLVED: The conditional variance of X, given Y, is defined by Var(X| Y) = E[(X E[XI YI) Y]Prove the conditional variance formula, namely,Var(X ) E[Var(X| Y)] Var(E[XI YI)Use this to
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