Make less than and more than ogive on same graph
C.I. F
5-15. 9
15-25. 3
25-35. 7
| X | f | Cumulative frequency |
| Less than 15 | 9 | 9 |
| Less than 25 | 3 | 12 |
| Less than 35 | 7 | 19 |
| X | f | Cumulative frequency |
| More than 5 | 9 | 19 |
| More than 15 | 3 | 10 |
| More than 25 | 7 | 7 |
