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A tire manufacturer would like to estimate the average tire life of its new all-season light truck tire in terms of how m; miles it

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A tire manufacturer would like to estimate the average tire life of its new all-season light truck tire in terms of how m; miles it lasts. Determine the sample size needed to construct a 97% condence interval with a margin of error equal 2,200 miles. Assume the standard deviation for the tire life of this particular brand is 8,000 miles. The sample size needed is D. (Round up to the nearest integer.)

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