What is the mean deviation about the mean for the data: 3, 9, 5, 3, 12, 10, 18, 4, 7, 19, 21, 11?
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Question

What is the mean deviation about the mean for the data: 3, 9, 5, 3, 12, 10, 18, 4, 7, 19, 21, 11?

Accepted Answer

First, find the mean of the data. Sum = 126, N = 12, Mean = 126/12 = 10.5. The absolute deviations from 10.5 are calculated and averaged to get the mean deviation, which evaluates to 5.25.

Statistics

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