If you want to predict the grades for a group of first-year graduate students in physics, you can generally predict better from their GRE verbal scores than from their GRE quantitative scores. The main explanation for this observation is that

Question

Quizplus · Accepted Answer

The main reason you can predict the grades of first-year graduate students in physics better from their GRE verbal scores than from their GRE quantitative scores is that physics graduate students tend to have less variation in their quantitative scores (since high quantitative skills are a prerequisite for the field) and more variation in their verbal scores. This variation in verbal scores can then be more predictive of differences in academic performance.

If You Want to Predict the Grades for a Group