Please answer the following question:

4. You are working on a research presentation with a friend. They have run a regression on exam scores and hours spent studying. Formally, they have run the following: Exam Scores, = B, + B. (Hours Spent Studying) + e, The sample size was 18. B is equal to 7. Your friend tells you that the t-stat is 1.98 and therefore, "hours spent studying" is statistically significant at the 5% level (because |1.98> 1.96). Are they correct? (6 points)