1) Explain in what the point unusual was and whether it has high leverage, a large residual or both. 2) Explain whether the point is an influential point. 3) Explain whether removing the point result in a stronger or weaker correlation . 4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

Question

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Answer 1

Question

Chapter 8, Problem 31E

a.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

b.

To determine

1) Explain in what was the point unusual and whether it have high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

c.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

d.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

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Answer 2

Question

Chapter 8, Problem 31E

a.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

b.

To determine

1) Explain in what was the point unusual and whether it have high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

c.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

d.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

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Answer 3

Question

Chapter 8, Problem 31E

a.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

b.

To determine

1) Explain in what was the point unusual and whether it have high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

c.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

d.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

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Answer 4

Question

Chapter 8, Problem 31E

a.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

b.

To determine

1) Explain in what was the point unusual and whether it have high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

c.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

d.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

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Answer 5

Chapter 8, Problem 31E

a.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

b.

To determine

1) Explain in what was the point unusual and whether it have high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

c.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

d.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

Answer 6

Chapter 8, Problem 31E

a.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

Answer 7

Chapter 8, Problem 31E

a.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

Answer 8

b.

To determine

1) Explain in what was the point unusual and whether it have high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

Answer 9

b.

To determine

1) Explain in what was the point unusual and whether it have high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

Answer 10

c.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

Answer 11

c.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

Answer 12

d.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

Answer 13

d.

To determine

1) Explain in what the point unusual was and whether it has high leverage, a large residual or both.

2) Explain whether the point is an influential point.

3) Explain whether removing the point result in a stronger or weaker correlation.

4) Explain whether the point were removed, would the slope of the regression line increase or decrease.

Answer 14

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Answer 15

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Answer 16

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Answer 17

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