Grades A Statistics instructor created a linear regression equation to predict students' final exam scores from their midterm exam scores. The regression equation was
(a) If Susan scores a 70 on the midterm, what did the instructor predict for her score on the final?
(b) Susan got an 80 on the final How big is her residual?
(c) If the standard deviation of the final was 12 points and the standard deviation of the midterm was 10 points, what is the correlation between the two tests?
(d) How many points would someone need to score on the midterm to have a predicted final score of 100?
