| Class interval | Frequency |
| \(30 - 50\) | 22 |
| \(50 - 70\) | 21 |
| \(70 - 90\) | 10 |
| \(90 - 110\) | 11 |
| \(110 - 130\) | 18 |
Find the difference between the upper limit of the median class and the lower limit of the modal class.
Answer:
The difference between the upper limit of the median class and the lower limit of the modal class is