Calculate the mean of the following data : Class Frequency
Calculate the mean of given data:
The given data is not continuous.
So, we subtract 0.5 from the lower limit and add 0.5 in the upper limit of each class.
Class | Class Marks (xi) | Frequency (fi) | fixi |
3.5 – 7.5 | 5.5 | 5 | 27.5 |
7.5 – 11.5 | 9.5 | 4 | 38 |
11.5 – 15.5 | 13.5 | 9 | 121.5 |
15.5 – 19.5 | 17.5 | 10 | 175 |
Σfi = 28 | Σfixi = 362 |
Mean
Therefore, mean of the given data