Question

find mean deviation about median for given data no.of student 6 4 16 7 8 2 marks 20 9 25 50 40 80 ​

Answer 1

Step-by-step explanation:

Let us arrange marks in ascending order.

Marks f cf

9 4 4

20 6 10

25 16 26

40 8 34

50 7 41

80 2 43

n=43

Here, n=43, which is odd

Position of median =(

2

n+1

)

th

observation.

=(

2

43+1

)

th

observation.

=22

nd

observation.

The above table shows that all items from 11 to 26 have their value 25. So, the value of 22

nd

item is 25.

∴ Median =25