The data set represents the number of rings each person in a room is wearing. 0, 2, 4, 0, 2, 3, 2, 8, 6 What is the interquartile range of the data?

Sort the data: 0, 0, 2, 2, 2, 3, 4, 6, 8. The median is 2; the lower half has median Q1 = (0 + 2) ÷ 2 = 1, and the upper half has median Q3 = (4 + 6) ÷ 2 = 5. The interquartile range is Q3 − Q1 = 5 − 1 = 4, so the correct choice is 4.

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