How do you do longhand

Hypothesis Testing Using Rejection Regions In Exercises 23-30, (a) identify the claim and state Ho and Ha, (b) find the critical value(s) and identify the rejection region(s), (c) find the standardized test statistic x-, (d) decide whether to reject or fail to reject the null hypothesis, and (e) interpret the decision in the context of the original claim. Assume the population is normally distributed.28. Hotel Room Rates A travel analyst claims that the standard deviation of the room rates for two adults at three-star hotels in Denver is at least $68. A random sample of 18 three-star hotels has a standard deviation of $40. At a = 0.01, is there enough evidence to reject the claim?II {Actapredfram Erpediaj