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Question
Prepare the cumulative frequency (less than types) table from the following distribution table :
| Class | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 |
| Frequency | 2 | 3 | 7 | 8 | 5 |
Solution
| Class | Frequency | Cumulative frequency less than type |
| 0-10 | 2 | 2 |
| 10-20 | 3 | 2 + 3 = 5 |
| 20-30 | 7 | 5 + 7 = 12 |
| 30-40 | 8 | 12 + 8 = 20 |
| 40-50 | 5 | 20 + 5 = 25 |
| Total | 25 | - |
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