An instructor wants to know whether there is a difference between the statistic tutorial group and the non-statistic tutorial group (who did not take any tutorial) in exam performance. The instructor decides to conduct a study to compare the exam performance of these two groups. What is the purpose of this study?
1) To determine if taking a statistics tutorial improves exam performance
2) To compare the exam performance of the statistic tutorial group and the non-statistic tutorial group
3) To determine if there is a significant difference in exam performance between the two groups
4) To evaluate the effectiveness of the statistics tutorial program