阿摩線上測驗
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阿摩線上測驗
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4. (10%) Let X₁, X₂, ... , Xₙ, Xₙ₊₁ be a sample from normal population having an unknown mean μ and variance 1. Let 
be the average of the first n of them.
(b) If
= 4, give an interval that, with 90 percent confidence, will contain the value of
Xₙ₊₁. (5%)