42. Drug abuse A survey was conducted in the United States and 10 countries of Western...
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42. Drug abuse A survey was conducted in the United States and 10 countries of Western Europe to determine the percentage of teenagers who had used marijuana and other drugs. The results are summarized in the following table. Country Czech Rep. 22 Percent Who Have Used Marijuana Other Drugs 4 Denmark 17 3 England 40 21 Finland 5 1 Ireland 37 16 Italy 19 8 No. Ireland 23 14 Norway 6 3 Portugal 7 3 Scotland 53 31 United States 34 24 a) Create a scatterplot. b) What is the correlation between the percent of teens who have used marijuana and the percent who have used other drugs? c) Write a brief description of the association. d) Do these results confirm that marijuana is a "gateway drug," that is, that marijuana use leads to the use of other drugs? Explain. 42. Drug abuse A survey was conducted in the United States and 10 countries of Western Europe to determine the percentage of teenagers who had used marijuana and other drugs. The results are summarized in the following table. Country Czech Rep. 22 Percent Who Have Used Marijuana Other Drugs 4 Denmark 17 3 England 40 21 Finland 5 1 Ireland 37 16 Italy 19 8 No. Ireland 23 14 Norway 6 3 Portugal 7 3 Scotland 53 31 United States 34 24 a) Create a scatterplot. b) What is the correlation between the percent of teens who have used marijuana and the percent who have used other drugs? c) Write a brief description of the association. d) Do these results confirm that marijuana is a "gateway drug," that is, that marijuana use leads to the use of other drugs? Explain.
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