Question: 12. Effects of Clusters Refer to the Minitab-generated scatterplot given in Exercise 12 of Section 10-2. a. Using the pairs of values for all 8

12. Effects of Clusters Refer to the Minitab-generated scatterplot given in Exercise 12 of Section 10-2.

a. Using the pairs of values for all 8 points, find the equation of the regression line.

b. Using only the pairs of values for the four points in the lower left corner, find the equation of the regression line.

c. Using only the pairs of values for the four points in the upper right corner, find the equation of the regression line.

d. Compare the results from parts (a), (b), and (c).

Finding the Equation of the Regression Line and Making Predictions. Exercises 13–32 use the same data sets as Exercises 13–32 in Section 10-2. In each case, find the regression equation, letting the first variable be the independent (x) variable. Find the indicated predicted values. Caution: When finding predicted values, be sure to follow the prediction procedure described in this section.

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