GRADE | N | Mean | Std. Deviation | Std. Error | 95% Confidence Interval for Mean | Minimum | Maximum | |
Lower Bound | Upper Bound | |||||||
group1 | 36 | 252.500 | 113.3302 | 18.8884 | 214.155 | 290.845 | 200.0 | 830.0 |
group3 | 32 | 201.656 | 70.1177 | 12.3952 | 176.376 | 226.936 | 10.0 | 291.0 |
Total | 68 | 228.574 | 98.1726 | 11.9052 | 204.811 | 252.336 | 10.0 | 830.0 |