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Let Z have the following density function: fZ(z)={5/7 if1z2,1/ 7 if5z7, 0 otherwise} Find E(Z)andVar(Z) Expectation = Variance =

LetZhave the following density function:

fZ(z)={5/7 if1z2,1/ 7 if5z7, 0 otherwise}

Find E(Z)andVar(Z)

Expectation =

Variance =

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