Table 1.
Distribution of students in the study group
| Frequency | Percent | |
|---|---|---|
| 6th Grade | 567 | 15,5 |
| 7th Grade | 483 | 13,2 |
| 8th Grade | 466 | 12,7 |
| 9th Grade | 718 | 19,6 |
| 10th Grade | 619 | 16,9 |
| 11th Grade | 802 | 21,9 |
| Total | 3655 | 100,0 |
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