Problem 9.54

A national publication reported that a college student living away from home spends, on average, no more than $15 per month on laundry. You believe this figure is too low and want to disrpove this claim. To conduct the test, you randomly select 35 college students and ask them to keep track of the amount of money they spend during a given month for laundry. The sample produces an average expenditure on laundry of $19.34 with a standard deviation of $4.52. Use these sample data to conduct the hypothesis test. Assume you are willing to take a 10% risk of making a Type I error.
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