appose that we wish to test HO: u = 40 versus Ha: u # 40, where the population standard deviation is own to equal 18. Also, suppose that a sample of 81 measurements randomly selected from the population is a mean equal to 35. A. Calculate the value of the test statistic z. B. By comparing z with critical values, test HO versus Ha at a =.05. C. Calculate the p-value for testing HO versus Ha. u D. Use the p-value to test HO versus Ha at each of a = .10, .05, .01, and .001. E. How much evidence is there that HO: u = 40 is false and Ha: # 40 is true.

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