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Smoking 2011, women and men In Exercise 16, we examined

Chapter 8, Problem 22E

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QUESTION:

Problem 22E

Smoking 2011, women and men In Exercise 16, we examined the percentage of men aged 18–24 who smoked from 1965 to 2011 according to the Centers for Disease Control and Prevention. How about women? Here’s a scatterplot showing the corresponding percentages for both men and women:

a) In what ways are the trends in smoking behavior similar for men and women?

b) How do the smoking rates for women differ from those for men?

c) Viewed alone, the trend for men may have seemed to violate the Linearity Condition. How about the trend for women? Does the consistency of the two patterns encourage you to think that a linear model for the trend in men might be appropriate? (Note: there is no correct answer to this question; it is raised for you to think about.)

Exercise 16:

Smoking 2011 The Centers for Disease Control and Prevention track cigarette smoking in the United States. How has the percentage of people who smoke changed since the danger became clear during the last half of the 20th century? The scatterplot shows percentages of smokers among men 18–24 years of age, as estimated by surveys, from 1965 through 2011 (http://www.cdc .gov/nchs/).

a) Is there a clear pattern? Describe the trend.

b) Is the association strong?

c) Is a linear model appropriate? Explain.

Questions & Answers

QUESTION:

Problem 22E

Smoking 2011, women and men In Exercise 16, we examined the percentage of men aged 18–24 who smoked from 1965 to 2011 according to the Centers for Disease Control and Prevention. How about women? Here’s a scatterplot showing the corresponding percentages for both men and women:

a) In what ways are the trends in smoking behavior similar for men and women?

b) How do the smoking rates for women differ from those for men?

c) Viewed alone, the trend for men may have seemed to violate the Linearity Condition. How about the trend for women? Does the consistency of the two patterns encourage you to think that a linear model for the trend in men might be appropriate? (Note: there is no correct answer to this question; it is raised for you to think about.)

Exercise 16:

Smoking 2011 The Centers for Disease Control and Prevention track cigarette smoking in the United States. How has the percentage of people who smoke changed since the danger became clear during the last half of the 20th century? The scatterplot shows percentages of smokers among men 18–24 years of age, as estimated by surveys, from 1965 through 2011 (http://www.cdc .gov/nchs/).

a) Is there a clear pattern? Describe the trend.

b) Is the association strong?

c) Is a linear model appropriate? Explain.

ANSWER:

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The scatter plot shows the trend of smoking behavior in men and women

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