Eight car dealerships reported the number of cars they sold last month.Car DealershipNumber of Cars SoldGMC84Chevrolet81Nissan92Toyota92Ford 95Honda94Hyundai80Acura72What is the interquartile range of this set of data?

Arrange the sales in order: 72, 80, 81, 84, 92, 92, 94, 95. The lower half has a median of (80 + 81) ÷ 2 = 80.5, and the upper half has a median of (92 + 94) ÷ 2 = 93. The interquartile range is Q3 − Q1 = 93 − 80.5 = 12.5, so the correct choice is 12.5.

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