Weakening an Argument about Study Timing

In a recent study, researchers claimed that students who study late at night score higher on math tests compared to those who study in the morning. They suggest that the quiet hours of the night allow for better concentration and retention of information. However, this conclusion is contested by a concerned educator who points out that many of the students in the study were also involved in after-school sports, which may have contributed to their higher math scores due to increased discipline and time management.