Students reported volunteering at the animal shelter during the last 6 months for 25, 36, 31, and 32 hours. What is the mean absolute deviation for the number of hours students volunteered? Round to the nearest tenth.

First find the mean: (25 + 36 + 31 + 32) ÷ 4 = 31 hours. The absolute deviations from 31 are 6, 5, 0, and 1 hours, whose mean is (6 + 5 + 0 + 1) ÷ 4 = 3 hours. The mean absolute deviation is 3 hours, which is choice B.

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