KEAM 2018 Math Paper

Mean of the given data is
The deviations of the respective observations from the mean x, i.e. xi−x are The absolute values of the deviations, i.e. |xi−x| are 4,3,3,3,0,3,2
The required mean deviation about the mean is
MD(x)=‌

7 ∑ i=1 |xi−x|

7

=‌

4+3+3+3+0+3+2

7

=‌

18

7

=2.57