Question

Find the mean deviation from the median for the data:

Marks obtained	10	11	12	14	15
No. of students	2	3	8	3	4

Answer 1

To find the mean deviation from the median, firstly let us calculate the median.

We know, N = 20

Median = (20)/2 = 10

So, the median corresponding to 10 is 12

N = 20

MD = 1/n ∑ⁿ_i=1|d_i|

= 1/20 × 25

= 1.25

∴ The mean deviation is 1.25