Find the median weight for the following data.
Weight (in kg) | 45 | 46 | 48 | 50 | 52 | 54 | 55 |
Number of students | 8 | 5 | 6 | 9 | 7 | 4 | 2 |
By arranging the data in ascending order,
Weight (in kg) (x) | Number of students (f) | Cumulative frequency |
45 | 8 | 8 |
46 | 5 | 13 |
48 | 6 | 19 |
50 | 9 | 28 |
52 | 7 | 35 |
54 | 4 | 39 |
55 | 2 | 41 |
N = 41 |
N = 41 (odd number)
Median = value of the 
term
= 
Median is the 21st term which is 50.
As we can see student from 20th to 28th comes under the weight of 50 so the median weight of the student is 50 kg.
8