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Mileage tests were conducted on a randomly selected sample of 100 newly developed automobile tires. The average tread life was found to be 80,000 kilometers

Mileage tests were conducted on a randomly selected sample of 100 newly developed automobile tires. The average tread life was found to be 80,000 kilometers with a standard deviation of 5,600 kilometers. We want to determine the best estimate of the average tread life in miles for the entire population of these tires.

State the distribution needed. Explain your reasoning. (2 marks)

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