Class interval is the difference between the upper limit and lower limit
Like for this example
| Number of Balls | Runs |
| 0 - 10 |
23 |
| 10 - 20 | 12 |
| 20 - 30 | 15 |
| 30 - 40 | 31 |
| 40 - 50 | 8 |
| 50 - 60 | 1 |
Class interval = Upper Limit - Lower Limit
= 10 - 0
= 10
Written on Dec. 21, 2016, 7:03 p.m.