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Number of participants by grade, age, and sex
| Boys | Girls | |||
|---|---|---|---|---|
| Grade | n | M Age | n | M Age |
| 3 | 1 | 8 | 3 | 8 |
| 4 | 27 | 9.11 | 28 | 9.19 |
| 5 | 25 | 10.08 | 24 | 10.25 |
| 6 | 19 | 11.05 | 21 | 11.1 |
| 7 | 25 | 12.16 | 17 | 12.06 |
| 8 | 23 | 13.27 | 20 | 13.25 |
| 9 | 9 | 14 | 14 | 14.14 |
| Total | 129 | 11.25(1.686) | 127 | 11.24(1.785) |
