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Determine z-score-empirical rule

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A certain brand of automobile tire has a mean span of 3500 miles and a standard deviation of 2000 miles. (assume the life spans of the tires have a bell-shaped distribution)

The life span of a randomly selected tire is 33160 miles.What is the x-z-score that corresponds to this life spans?

The life span of the randomly selected tie is 3300 miles, Using the Empirical Rule, find the precentile that corresponds to the life span.

Reference no: EM13106828

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