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Question: 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 table.
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.
Fifty raffle tickets are numbered 1 throughout 50, and one of them is drawn at random. What is the probability that the number is a multiple of 5 or 8? Consider the following "solution": Since 10 tickets bear numbers that are multiples of 5 and 6 ..
The time it takes to process phone orders in a small florist/gift shop is normallydistributed with a mean of 6 minutes and a standard deviation of 1.24 minutes.a. What cutoff value would separate the 2.5% of orders that take the most time topr..
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Joe DiMaggio. Yankee center fielder Joe DiMaggio was paid $32,000 in 1940 and $100,000 in 1950. Express his 1940 salary in 1950 dollars.
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a tire manufacturer wants to determine the inner diameter of a certain grade of tire. ideally the diameter would be
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