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Please explain A test is made of H : u = 18 versus H,: u # 18. A sample of size n = 45 is

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A test is made of H : u = 18 versus H,: u # 18. A sample of size n = 45 is drawn, and x = 16. The population standard deviation is 6 = 6. (a) Compute the value of the test statistic z. (b) Is Ho rejected at the a = 0.01 level? (c) Is Ho rejected at the a = 0.05 level

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