3 By Late 1971 All Cigarette Packs Had To Be Labeled With The Words Warning The Surgeon General Has Determined That 1 (195.89 KiB) Viewed 36 times
3 By Late 1971 All Cigarette Packs Had To Be Labeled With The Words Warning The Surgeon General Has Determined That 2 (98.92 KiB) Viewed 36 times
3. By late 1971, all cigarette packs had to be labeled with the words, "Warning: The Surgeon General Has Determined That Smoking Is Dangerous To Your Health.” The case against smoking rested heavily on statistical evidence, rather than laboratory. Extensive surveys of smokers and nonsmokers had revealed the former to have much higher risks of dying from a variety of causes, including heart disease. Typical of that research are the data represented in the scatterplot below showing the annual cigarette consumption, x, and the corresponding mortality rate, y, due to coronary heart disease (CHD) for twenty-one countries, along with the linear model y 0.06x + 15.7. "Average annual cigarettes smoked per adult" vs "CHD mortality (per 100K)" 300 250 200 y = 0.06x + 15.7 150 100 50 1000 2000 0 3000 4000 5000
(a) (2 points) The y-intercept of the linear model, 15.7, has a sensible interpretation here. What is it? (b) (2 points) What does the model predict for the CHD mortality rate of a country where the average adult smokes 2500 cigarettes annually? Box your final answer! (c) (2 points) Does this analysis prove that smoking cigarettes results in higher rates of coronary heart disease? Why or why not?
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