5. The manufacturer of the X-15 steel-belted radlal truck tire clalms that the mean mileage the tire can be driven before the tread wears out is 60,000 mlles. Assume the mileage wear follows the...

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Extracted text: 5. The manufacturer of the X-15 steel-belted radlal truck tire clalms that the mean mileage the tire can be driven before the tread wears out is 60,000 mlles. Assume the mileage wear follows the normal distributlon and the standard devl- ation of the distributlon is 5,000 mlles. Crosset Truck Company bought 48 tires and found that the mean mileage for Its trucks Is 59,500 mlles. Is Crosset's experl- ence different from that claimed by the manufacturer at the 05 slanlficance lovel?


Extracted text: For Exercises 5-8: (a) State the null hypothesis and the alternate hypothesis. (b) State the decision rule. (c) Compute the value of the test statistic. (d) What is your decision regarding H,? (e) What is the p-value? Interpret it.