Problem 1 (grade point average)refer tograde point averagedata in problem 1.19. the data can be downloaded or read intorfrom: the variables from left to right are, y= gpa, x1= act score, x2= intelligence test score, x3= highschool class rank percentile.

a. prepare a box plot for the act scoresx1i. are there any noteworthy features in this plot? the boxplot shows a fairly symmetric distribution with large tails indicating a bell-shaped curve.
b. prepare a dot plot of the residuals. what information odes this plot provide?