A manufacturer claims that the average tread life of a premium tire exceeds the average tread...

A manufacturer claims that the average tread life of a premium tire exceeds the average tread life of economy tire of the same size by at least 5000 miles. To test this claim, 50 pieces of each type of tires were tested under similar conditions. The premium tire had an average tread life of 43000 miles with a sample standard deviation of 2300, while economy tire had an average tread life of 37500 miles with a sample standard deviation of 1800. Test the manufacturer’s claim using a 0.05 level of significance. Calculate P-Value.

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orchestra answered 1 year ago

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