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  3. the tread of life of a particular brand of tire is

the tread of life of a particular brand of tire is a random variable best described...

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Statistics

the tread of life of a particular brand of tire is a randomvariable best described by a normal distribution with a mean of70000 miles and a standard deviation of 9300 miles. what warrantyshould the company use if they want 89.25% of the tires to outlastthe warranty? round to the nearest integer. (show workplease)

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