5. (20%) Let X be a random variable with mean /.i and finite varianceσ2. Wc want to test the hypotheses, where /iq is specified. Let X1, • • •, Xn be a random sample from the distribution of X and denote the sample mean and variance by and S2respectively.
申論題內容
(a) Find the decision rule with the approximate size a of the test.
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, where /iq is specified. Let X1, • • •, Xn be a random sample from the distribution of X and denote the sample mean and variance by 
and S2respectively.