Find the mean deviation about the median for the following data :
12, 5, 14, 6, 11, 13, 17, 8, 10
Here the number of observations is 9 which is odd.
Arranging the data into ascending order, we have 5, 6, 8, 10, 11, 12, 13, 14, 17
Now,
The respective absolute values of the deviations from median , i.e. are
6, 5, 3, 1, 0, 1, 2, 3, 6
Thus, the required mean deviation about the median is