Q2 of 23 Page 15

Find the mean deviation about the mean for the data in Exercises.

38, 70, 48, 40, 42, 55, 63, 46, 54, 44

We first find the mean (x̅) of the data


The respective absolute values of the deviations from mean, i.e., |xi – x̅| are


12, 20, 2, 10, 8, 5, 13, 4, 4, 6


Therefore


And


Hence, the mean deviation about the mean for the given data is 8.4.

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