Intro Stats, Books a la Carte Edition (5th Edition)
5th Edition
ISBN: 9780134210285
Author: Richard D. De Veaux, Paul Velleman, David E. Bock
Publisher: PEARSON
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Chapter 20, Problem 22E
Drug use 2013 The 2013 World Drug Report investigated the prevalence of drug use as a percentage of the population aged 15 to 64. Data from 32 European countries are shown in the following
Response variable is Cocaine
R-squared = 25.8%
s = 0.7076 with 32 – 2 = 30 degrees of freedom
- a) Explain in context what the regression says.
- b) State the hypothesis about the slope (both numerically and in words) that describes how use of cannabis is associated with other drugs.
- c) Assuming that the assumptions for inference are satisfied, perform the hypothesis test and state your conclusion in context.
- d) Explain what R-squared means in context.
- e) Do these results indicate that cannabis use leads to the use of harder drugs? Explain.
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Chapter 20 Solutions
Intro Stats, Books a la Carte Edition (5th Edition)
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