Eight car dealerships reported the number of cars they sold last month.Car DealershipNumber of Cars SoldGMC84Chevrolet81Nissan92Toyota92Ford95Honda94Hyundai80Acura72What is the upper and lower quartile of this set of data?

First, sort the sales figures: 72, 80, 81, 84, 92, 92, 94, 95. The lower half is 72, 80, 81, 84, so its median is (80 + 81) ÷ 2 = 80.5. The upper half is 92, 92, 94, 95, so its median is (92 + 94) ÷ 2 = 93. Therefore, choice A gives the lower quartile of 80.5 and upper quartile of 93.

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