A test is made of Ho: u = 20 versus H : u # 20. A sample of size n = 55 is drawn, and
A test is made of Ho: u = 20 versus H : u # 20. A sample of size n = 55 is drawn, and x = 18. The population standard deviation is 6 = 8. (a) Compute the value of the test statistic z. (b) Is Ho rejected at the a = 0.10 level? (c) Is Ho rejected at the a = 0.05 level? Part: 0 / 3 Part 1 of 3 (a) Compute the value of the test statistic. Round the answer to at least two decimal places
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