Find the mean deviation about median for the following data:

Explanation

Here `n=50impliesN/2=50/2=25`
`:.` Median class is 20-30.
Now `l_(1)=20, l_(2)=30, C=14, f=14`
and median `M=l_(1)+((N/2-C)xx(l_(2)-l_(1)))/f`
`M=20+((25-14)xx10)/14`
`=20+7.85`
`=27.85`
Now mean deviation `=(sumf_(i)d_(i))/(sumf_(i))`
`=517.1/50`
`=10.342`