Evaluate the Principal's Argument on Group Study Sessions

In a recent study, researchers found that students who study in groups perform better on exams compared to those who study alone. Based on this study, the principal of a local high school suggests implementing mandatory group study sessions for all classes to improve overall student performance.

Write an essay in which you analyze the argument presented above. Consider the validity of the study's conclusions and the effectiveness of the proposed solution. Identify any assumptions that the principal makes, and evaluate the implications of enforcing mandatory group study sessions.