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?

After removing 70, the mean of 34, 40, 42, and 48 is 164 ÷ 4 = 41. Their absolute deviations from 41 are 7, 1, 1, and 7; the mean of those deviations is 16 ÷ 4 = 4. The mean absolute deviation is 4, choice D.

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