If E[X]=μE[X] = \muE[X]=μ and Var(X)=σ2Var(X) = \sigma^2Var(X)=σ2, what is the expected value of the standardized variable Z=X−μσZ = \frac{X - \mu}{\sigma}Z=σX−μ?
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μ\muμ
σ\sigmaσ