Question

A certain brand of automobile tire has a mean life span of 33 comma 000miles and a standard deviation of 2 comma

200miles. (Assume the life spans of the tires have a bell-shaped distribution.)

(a) The life spans of three randomly selected tires are 35 comma 000

miles,38 comma 000miles, and 31 comma 000miles. Find the z-score that corresponds to each life span.For the life span of 35 comma 000miles, z-score is

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