I think this record of academic performance speaks more about the individual rather than the "usual suspect" correlations. For instance, she clearly is the type of student that meets a challenge head on (by coming back from a poor midterm) - which would negate the correlation between time spent studying and GPA (more time spent to just recover a grade). She also did not say whether worst test scores are dropped and how that was treated. She has good habits and sleeps as much as she should, but what about exercise? There's a lot of research that supports the claim that cardio activity improves brain function. It's too bad she didn't pay more attention to this. Still, a very determined 4 year analysis.