100 80 60 40 20 20 40 60 80 100 The scatterplot shows the Exam 1 and Exam 2 scores for a class of 755 integral calculus students during a previous semester. The x-coordinate is the exam 1 score; the...

Extracted text: 100 80 60 40 20 20 40 60 80 100 The scatterplot shows the Exam 1 and Exam 2 scores for a class of 755 integral calculus students during a previous semester. The x-coordinate is the exam 1 score; the y-coordinate is the exam 2 score. Based on the picture, you may assume correlation and regression is appropriate to use for this data set, and assume scores need not necessarily be integer values. The summary statistics: Average Exam 1 score 70 SD - 22.5 Average Exam 2 score 74 SD x 18 r z 0.7 For this group of integral calculus students, an extra 10 points on Exam 1 is associated with an extra points on Exam 2, on average. Compute the r.m.s.-error associated with using the regression method to estimate Exam 2 from Exam 1.