Q. 14.1( 95 Votes )
Find the mean deviation about the mean for the data in Exercises.
4, 7, 8, 9, 10, 12, 13, 17
Answer :
We first find the mean (x̅ ) of the given data
The respective absolute values of the deviations from mean, i.e., |xi – x̅| are
6, 3, 2, 1, 0, 2, 3, 7
Therefore 
And 
Hence, the mean deviation about the mean for the given data is 3.
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