Data Interpretation of Study Methods

In a recent study, researchers examined the effects of different study methods on high school student performance in mathematics. They compared students who used flashcards, students who engaged in group study, and students who self-studied. The results indicated that students using flashcards scored an average of 85%, group study students scored an average of 75%, and self-studying students scored an average of 70% on their mathematics tests.

Based on these findings, explain which study method appeared to be the most effective and provide a rationale for your answer using data from the study.