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8.1.8 Suppose that (X1, . .., Xn) is a sample from an N(Mo, ) distribution, where Mo is known and o > 0 is unknown.

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8.1.8 Suppose that (X1, . .., Xn) is a sample from an N(Mo, ) distribution, where Mo is known and o > 0 is unknown. Show that _ _(x; - No) is a sufficient statistic for this problem. Using the fact that it is complete, determine a UMVU estimator for 62

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