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5. Let Yi,Y2, , Yn be a random sample of size n from the pdf (a) Show that θ = y is an unbiased estimator for θ (b) Show that θ = 1Y is a minimum-variance estimator for θ.
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a)The pdf ofyis Let θ2įsUBE of θ Proof Therefore, θ-is UBE of θ b) The pdf of y is which can be written as whihc is of the fo

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