Although airline schedules and cost are important factors for business travelers when choosing an airline carrier, a USA Today survey found that business travelers list an airline’s frequent flyer program as the most important factor. From a sample of n = 1993 business travelers who responded to the survey, 618 listed a frequent flyer program as the most important factor.

A year before the USA Today survey was taken, reports indicated the percentage business travelers listing a frequent flyer program as the most important factor in choosing an airline equaled 32.5%..........

Part a. perform the appropriate test to determine whether there has been a change in the percentage choosing a frequent flyer program as the most important factor. USE THE P-VALUE METHOD for making your decision. Be sure to include all steps of the hypothesis testing procedure............

Part b. Construct a 95% confidence interval estimate for the proportion of business travellers who believe a frequent flyer program is the most important factor when choosing an airline carrier. Briefly, how does the interval support the result of your hypothesis test?