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Let X1,)(;,...,X,1 be an n independent random sample from a normal distribution with mean y and variance 100. To test Ho :p=100 against H1.'p=110, let

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Let X1,)(;,...,X,1 be an n independent random sample from a normal distribution with mean y and variance 100. To test Ho :p=100 against H1.'p=110, let the best critical region of the test is 20 and a==0.05. Find C. the best critical region and n. the minimum sample size needed for the test (6 marks)

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