Calculate mean deviation and its coefficient from the median of the following data:

Explanation

M=Size of `((N)/(2))`th item =Size of `((33)/(32))`th item
=Size of 16.5th item
140-160 is the Median Class Interval.
The Mediun is calculated as
`M=l_(2)+((N)/(2)-c.f.)/(f)xxi`
`=140+(16.5-10)/(10)xx20`
=140+13=153
Mean Deviation from Medium
`MD_(m)=(sumf|dm|)/(sumf)=(661)/(33)=20.03`
Coefficient of Mean Deviation
`(MD_(m))/(M)=(20.03)/(153)=0.1309`
`MD_(m)`=20.03, Coefficient of `MD_(m)`=0.1309.