8. (a) On an 8 11 piece of graph paper, construct a scatterplot for the data

8.

(a) On an 8½ × 11 piece of graph paper, construct a scatterplot for the data of Problem 6. Mark off divisions on the two axes so that the plot will be as large as possible and as close to square as possible. Plot the data points accordingly, and draw in the regression line as described in Section 8.3.

(b) Using a straightedge with the regression line, estimate (accurate to one decimal place)

the predicted principal ratings for the three applicants in Problem 6c. Compare these values with the Yˆ values you calculated earlier from the regression equation.