Mathematics, 16.12.2021 01:00 lexiships

The average life of an automobile tire of a certain manufacturer follows a Normal distribution, with a mean of 32,000 miles and a standard deviation of 1,250. Use the z-table to answer the question.

31,344 miles
32,650 miles
32,875 miles
33,250 miles

What tire life span separates the upper 30% of the life spans from the lower 70% of the life spans?

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