A set of data has the values 34, 40, 42, 48, and 70. If the outlier of 70 is removed, what is the mean absolute deviation of the remaining four values?

The remaining values are 34, 40, 42, and 48. Their mean is (34 + 40 + 42 + 48) ÷ 4 = 41, and their absolute deviations from 41 are 7, 1, 1, and 7. The mean of those deviations is (7 + 1 + 1 + 7) ÷ 4 = 4, so the answer is 4.

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