A test is made of H : J = 18 versus H, : H > 18. A sample of size n - 45 is drawn, and x - 20. The population standard deviation is o = 7. (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 = 0.01 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. Z = Submit Assignment