1. In Exercises 27–30, test the claim about the population mean m at the level of significance a. Assume the population is normally distributed. If convenient, use technology. 27. Claim: m = 40; a =...

1. In Exercises 27–30, test the claim about the population mean m at the level of significance a. Assume the population is normally distributed. If convenient, use technology.

27. Claim: m = 40; a = 0.05; s = 1.97 Sample statistics: x = 39.2, n = 25

28. Claim: m 7 1745; a = 0.10; s = 32 Sample statistics: x = 1752, n = 28

29. Claim: m _ 8550; a = 0.02; s = 314 Sample statistics: x = 8420, n = 38

30. Claim: m … 22,500; a = 0.01; s = 1200 Sample statistics: x = 23,500, n = 45