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A certain brand of automobile tire has a mean life span of 32,000 miles and a standard deviation of 2,300 miles.(Assume the life spans of

A certain brand of automobile tire has a mean life span of 32,000 miles and a standard deviation of 2,300 miles.(Assume the life spans of the tires have abell-shaped distribution.)

(a) The life spans of three randomly selected tires are 35,000 miles, 36,000 miles, 31,000 miles. Find thez-score that corresponds to each life span.

For the life span of 35 comma 35,000 miles, z-score is ___.

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