|
Calculations :
i) Median (Me) = Size of 
= Size of 11th item.
Therefore, Median ( Me) = 8
ii) M. D. = 
Example ( Continuous series ) Calculate the mean deviation and the coefficient of mean deviation from the following data using the mean.
Difference in ages between boys and girls of a class.
|
Diff. in years: |
No.of students:
|
|
0 - 5 |
449 |
|
5 - 10 |
705 |
|
10 - 15 |
507 |
|
15 - 20 |
281 |
|
20 - 25 |
109 |
|
25 - 30 |
52 |
|
30 - 35 |
16 |
|
35 - 40 |
4 |
Click here to enlarge
Calculation:
1) X 
2) M. D. 
3) co - efficient of M. D. 
[next page]
|
