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A certain brand of automobile tire has a mean life span of 34000 miles and a standard deviation of 2200 miles.​ (Assume the life spans of the tires have a​ bell-shaped distribution.) ​(a) The life spans of three randomly selected tires are 35000 miles, 36000 miles, and 31000 miles. Find the​ z-score that corresponds to each life span. For the life span of 35000 miles, z-score is

A certain brand of automobile tire has a mean life span of 34000 miles and a standard deviation of 2200 miles.​ (Assume the life spans of the tires have a​ bell-shaped distribution.)

​(a) The life spans of three randomly selected tires are 35000 miles, 36000 miles, and 31000 miles. Find the​ z-score that corresponds to each life span. For the life span of 35000 miles, z-score is

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