Discussion:
Q1. Testing Claims,
(a) write the claim mathematically and identify Ho and Ha.
(b) find the critical value(s) and identify the rejection region(s).
(c) find the standardized test statistic.
(d) decide whether to reject or fail to reject the null hypothesis.
(e) interpret the decision in the context of the original claim.
For each claim, assume the population is normally distributed.
Q2. Microwave Repair Costs A microwave oven repairer says that the mean repair cost for damaged microwave ovens is less than $100. You work for the repairer and want to test this claim.You find that a random sample of five microwave ovens has a mean repair cost of $75 and a standard deviation of $12.50. At a = 0.01 do you have enough evidence to support the repairer's claim? (Adapted from Consumer Reports)