Solution-Perform the formal statistical test

Perform the formal statistical test

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A tire manufacturer claims (based on years of experience with its tires) that the tires' mean mileage is 55,000 km and the standard deviation is 7,500 km. A consumer agency randomly selects 100 of these tires and finds a sample mean of 48,750 km. Should the consumer agency doubt the manufacturer's claim that the mean mileage is 55,000 km? Perform the formal statistical test using a 5% level of significance.

Reference no: EM132487932

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Perform the formal statistical test

Reference no: EM132487932

Reference no: EM132487932

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