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




1