The Centers for Disease Control and Prevention track cigarette smoking in the United States (www.cdc.gov/ nchs). How
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The Centers for Disease Control and Prevention track cigarette smoking in the United States (www.cdc.gov/ nchs). 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 2014.
a) Is there a clear pattern? Describe the trend.
b) Is the association strong?
c) Is a linear model appropriate?
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Intro Stats
ISBN: 9780134668420
5th Edition
Authors: Richard D De Veaux, Paul F Velleman, David E Bock, Nick Horton
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