# Proof of an unbiased estimator

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7.1.1 Show that the mean of a random sample of size n from a distribution having pdf f( x; θ) = (1/θ) e^-(x/θ), 0 <x < infinity, 0 < θ < infinity, 0 elsewhere, is an unbiased estimator of θ and has variance θ^2/n.

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Proof of an unbiased estimator is provided.

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7.1.1 Show that the mean of a random sample of size n from ...

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