A tourist attraction gets over 50,000 visitors a year, but traffic has declined over the last few years. The manager has recently refurbished the buildings, added new activities, and generally spruced up the facility. A survey of customers done two years ago revealed that only 65% of them felt they had had an enjoyable experience. A survey of 400 visitors, done after the upgrades, indicated that 282 of them felt they had had an enjoyable experience. Does this provide any evidence that the upgrades improved visitor enjoyment? You have already examined this problem, in Chapter 6 Review Exercise 6.Complete a formal hypothesis test. Use α = 0.03.
Answer to relevant QuestionsA human resources manager claims that tuition subsidies for employees are not an important benefit, as only 5% of employees would use such a program. The union president thinks this estimate is too low. A survey of 500 ...When Doug Brackett bought Downtown Automotive, the previous owner suggested to him that average daily sales at the shop were $2,000. You have already examined this data set. Is there evidence that average daily sales at the ...The survey of drugstore customers also collected data on speed of service. At the 3% level of significance, is there evidence that more than 40% of customers rate the service as good or excellent? The college cafeteria manager claims that 90% of cafeteria customers are satisfied with the range of food served and prices. Suppose that in a random sample of 500 cafeteria customers, 438 say they are satisfied with the ...Return to the confidence interval you constructed for Develop Your Skills 8.2, Exercise 6. The owner of the supermarket claims that the average household grocery bill is $95. Does the sample evidence support the owner's ...
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