| Grade Trend | Hours slept | Hours Studied | Grade |
| Above | Low | High | Above |
| Below | High | Low | Below |
| Above | Low | High | Above |
| Above | High | High | Above |
| Below | Low | High | Below |
| Above | Low | Low | Below |
| Below | High | High | Below |
| Below | Low | High | Below |
| Above | Low | Low | Below |
| Above | High | High | Above |