5. It has been estimated that a HONDA car obtains a mean of 30 miles per gallon on the highway, and the company that manufactures the car claims that it exceeds this estimate in highway driving. To...

Extracted text: 5. It has been estimated that a HONDA car obtains a mean of 30 miles per gallon on the highway, and the company that manufactures the car claims that it exceeds this estimate in highway driving. To support its assertion, the company randomly selects 64 HONDAcars and records the mileage obtained for each car over a driving course similar to that used to obtain the estimate. The following data resulted: x = 31.2 miles per gallon, s = 8 miles per gallon. Test to determine if the mean of miles per gallon exceeds 30. Use a value of a = .025.