This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: is which? 4. A survey was conducted in the US 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 table: Percent Who Have Used a) Create a scatterplot of the data. Country Czech Rep. Denmark England Finland Ireland Italy No. Ireland Norway Portugal Scotland USA 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 Marijuana 2 2 17 40 5 37 19 23 6 7 5 3 34 d) Do these results confirm that marijuana is a "gateway drug", that is, that marijuana use leads to the use of other drugs? Explain. Other Drugs 4 3 21 1 16 8 14 3 3 31 2 4...
View Full Document
This note was uploaded on 04/12/2011 for the course STA 215 taught by Professor Tba during the Spring '08 term at Grand Valley State University.
- Spring '08