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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 many miles it

A tire manufacturer would like to estimate the average tire life of its new all-season light truck tire in terms of how many miles it lasts. Determine the sample size needed to construct a

99%

confidence interval with a margin of error equal to

1,800

miles. Assume the standard deviation for the tire life of this particular brand is

8,500

miles.

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