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Effects of Clusters Refer to the Minitab-generated

Chapter 10, Problem 12BSC

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QUESTION:

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 4 points in the lower left corner, find the equation of the regression line.

c. Using only the pairs of values for the 4 points in the upper right corner, find the equation of the regression line.

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

Questions & Answers

QUESTION:

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 4 points in the lower left corner, find the equation of the regression line.

c. Using only the pairs of values for the 4 points in the upper right corner, find the equation of the regression line.

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

ANSWER:

Problem 12 BSC

Answer:

Step1 of 4:

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

x

1

1

2

2

9

9

10

10

y

1

2

1

2

9

10

9

10

Step2 of 4:

Consider,

x

y

xy

1

1

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