Question: Supposethatconditionalon , thedistributionof Y is Poissonwithmeanparameter , but itself variesamongdifferentsegmentsofapopulation,with = E(). Usethelawofiterated expectationtofind E(Y ).

Supposethatconditionalon λ, thedistributionof Y is Poissonwithmeanparameter λ, but λ

itself variesamongdifferentsegmentsofapopulation,with μ = E(λ). Usethelawofiterated expectationtofind E(Y ).

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