Construct a cumulative frequency distribution of less than type for the following data.
| Class interval | Frequency |
| Below 30 | 13 |
| 30 \(-\) 35 | 3 |
| 35 \(-\) 40 | 7 |
| 40 \(-\) 45 | 18 |
| 45 \(-\) 50 | 7 |
| 50 \(-\) 55 | 14 |
Answer:
| Class interval | Cumulative frequency |
| \(\text{Less than }\)\(30\) | |
| \(\text{Less than }\)\(35\) | |
| \(\text{Less than }\)\(40\) | |
| \(\text{Less than }\)\(45\) | |
| \(\text{Less than }\)\(50\) | |
| \(\text{Less than }\)\(55\) |