Calculate Less than type Cumulative frequency table from the following grouped data
| Class | Frequency |
| 0 - 2 | 2 |
| 2 - 4 | 7 |
| 4 - 6 | 12 |
| 6 - 8 | 19 |
| 8 - 10 | 9 |
| 10 - 12 | 1 |
Solution:| Class | Frequency |
| 0 - 2 | 2 |
| 2 - 4 | 7 |
| 4 - 6 | 12 |
| 6 - 8 | 19 |
| 8 - 10 | 9 |
| 10 - 12 | 1 |
Less than cumulative frequency can be obtained by adding to the other frequencies.
| Class | Frequency | Less than type | Cumulative Frequency |
| 0 - 2 | 2 | Less than 2 | 2 |
| 2 - 4 | 7 | Less than 4 | 9 (= 2 + 7) |
| 4 - 6 | 12 | Less than 6 | 21 (= 9 + 12) |
| 6 - 8 | 19 | Less than 8 | 40 (= 21 + 19) |
| 8 - 10 | 9 | Less than 10 | 49 (= 40 + 9) |
| 10 - 12 | 1 | Less than 12 | 50 (= 49 + 1) |
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