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Social ScienceShow that: (a) Cov(X,Y) = E[XY] – E[X]E[Y].(b) If X and Y are independent, then fY|X(y|x) = fY(y)
Show that: (a) Cov(X,Y) = E[XY] – E[X]E[Y].
(b) If X and Y are independent, then fY|X(y|x) = fY(y)
Expert Answer
Solution:
a.Show that COV(X,Y)=E(XY)–E(X)E(Y)
...
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coY(X, Y) = E[x-χj(7-7)] (Χ - E[Y-- Υ+ N] - Ε(W) - (X) - ΣΕ(Υ) + Ε(Y) E(X) - X-N +Y (:X=Ε(Χ), F=E(Υ)) E(XY) -Ε(Χ)Ε (Υ)
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