Prove that [ begin{aligned} & (E[(X-E(X))(Y-E(Y))])^{2} & quad=Eleft[(X-E(X))left(X^{prime}-Eleft(X^{prime}ight)ight)(Y-E(Y))left(Y^{prime}-Eleft(Y^{prime}ight)ight)ight] end{aligned} ]
Question:
Prove that
\[
\begin{aligned}
& (E[(X-E(X))(Y-E(Y))])^{2} \\
& \quad=E\left[(X-E(X))\left(X^{\prime}-E\left(X^{\prime}ight)ight)(Y-E(Y))\left(Y^{\prime}-E\left(Y^{\prime}ight)ight)ight]
\end{aligned}
\]
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Related Book For 
Cases And Materials On Employment Law
ISBN: 9780199580712
8th Edition
Authors: Richard Painter, Ann Holmes
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