Question

2-5 Fou x + https:/ ucation The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 milles. Assume the mileage wear follows the normal distribution and the standard deviation of the distribution is 5,000 miles. Crosset Truck Company bought 48 tires and found that the mean mileage for its trucks is 59,500 miles. Crosset would like to know if their experience is different from the manufacturer's claim. 56z2 a. State the null hypothesis and the alternate hypothesis. b. State whether the decision rule is true or false: Reject H。ifzc-196 or z기.96 using a 0.05 significance level. O True False < Prey 3015 Next >

Answer 1