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.

The mean of 25, 36, 31, and 32 is 31 hours. Their absolute deviations from the mean are 6, 5, 0, and 1 hours; the average of these is (6 + 5 + 0 + 1) ÷ 4 = 3. Rounded to the nearest tenth, the mean absolute deviation is 3.0 hours, which is choice A, 3.

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