6.2.4. show that drivers get an average of 32,500 miles on a set of Road All-Weather tires. Hoping to improve that figure, the company has added a new polymer to the rubber that should help protect the tires from deterioration caused by extreme A.fteen drivers who tested the new tires have re(X)rted getting an average of the company daim that the polymer has produced a statistically increase intire miJeage? Test Ho:µ = 32,500 against a one-sided alternative at a = 0.05 level. Assume that the standard deviation (rr) of the tire
,...,,,...,"""" has not been affected by the addition of the polymer and is still 4000 miles.
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