(f) A critic might argue that there are other important factors besides class attendance that affect GPA. One obvious variable that might affect GPA is the problem set hand-in rate. A regression, estimated by OLS, ofattendpct on psrate yielded the following. (standard errors for each estimate are given in parentheses.) attendpct; = 35 + 0.536psrate; R2 = 0.39 (2.318) (0.0258) Given this information, how sure are you that Assumption SLR.4 holds for the GPA- attendpct regression? Give a well thought-out and logical reason for your answer (9 points). If we compute thet-statistic for testing that the slope opsrate is zero, we obtain .536 t = .0258 = 20.8 and we can easily rejected the null that the slope is zero for any reasonable significance level. There is strong evidence thatattendpct and psrate are correlated. Because psrate is part ofu in the original regression, we have strong evidence thatttendpct is correlated