Question
Prepare a frequency distribution by inclusive method taking class interval of 7 from the following data.
| 28 | 17 | 15 | 22 | 29 | 21 | 23 | 27 | 18 | 12 | 7 | 2 | 9 | 4 |
| 1 | 8 | 3 | 10 | 5 | 20 | 16 | 12 | 8 | 4 | 33 | 27 | 21 | 15 |
| 3 | 36 | 27 | 18 | 9 | 2 | 4 | 6 | 32 | 31 | 29 | 18 | 14 | 13 |
| 15 | 11 | 9 | 7 | 1 | 5 | 37 | 32 | 28 | 26 | 24 | 20 | 19 | 25 |
| 19 | 20 | 6 | 9 |