| One-side ANOVA | |||||||||
| GRADE | N | Mean | Std. Deviation | Std. Error | 95% Confidence Interval for Mean | Min | Max | ||
| Lower Bound | Upper Bound | ||||||||
| group1 | 36 | 105.444 | 59.2281 | 9.8714 | 85.405 | 125.484 | 21.0 | 305.0 | |
| group3 | 32 | 80.438 | 41.4868 | 7.3339 | 65.480 | 95.395 | 3.0 | 185.0 | |
| Total | 68 | 93.676 | 52.7920 | 6.4020 | 80.898 | 106.455 | 3.0 | 305.0 | |