Statistics: The Art and Science of Learning from Data (4th Edition)
4th Edition
ISBN: 9780321997838
Author: Alan Agresti, Christine A. Franklin, Bernhard Klingenberg
Publisher: PEARSON
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Textbook Question
Chapter 4.1, Problem 7PB
Speaking foreign languages A 2014 study (http://www.futurity.org/foreign-languages-make-us-less-moral/) examined the relationship between using a foreign language and acting for the common good. They examined two groups of people, one that used their native language and one that used a foreign language. Each group was presented with a moral dilemma that required the subject to make a choice about saving himself or herself versus sacrificing his or her life for the sake of saving others. Those using a foreign language chose saving others at a higher rate than those using their native language.
- a. Identify the response variable and the explanatory variable.
- b. Is this study an observational study or an experiment? Explain.
- c. Can we conclude that speaking a foreign language causes one to act morally? Explain.
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A study was conducted to explore the prevalence and impact of sleep problems on various aspects of people's lives. Staff from a university in Melbourne, Australia were invited to complete a questionnaire containing questions about their sleep behaviour (e.g. hours slept per night), sleep problems (e.g. difficulty getting to sleep) and the impact that these problems have on aspects of their lives (work, driving, relationships). The sample consisted of 271 respondents (55% female, 45% male) ranging in age from 18 to 84 years (M=43.9yrs). A student researcher is interested in examining whether the participants in the study sleep for 8 hours a night, the recommended average for adults.
1. Proposed analysis and why you chose the analysis
2. Measurement type (i.e., nominal, ordinal, continuous) for variable(s) that will be used in the analysis
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Chapter 4 Solutions
Statistics: The Art and Science of Learning from Data (4th Edition)
Ch. 4.1 - Cell phones Consider the cell phone Study 3...Ch. 4.1 - High blood pressure and binge drinking Many...Ch. 4.1 - Low-fat versus low-carb diet? One hundred...Ch. 4.1 - Experiments versus observational studies When...Ch. 4.1 - School testing for drugs Example 3 discussed a...Ch. 4.1 - Hormone therapy and heart disease Since 1976 the...Ch. 4.1 - Speaking foreign languages A 2014 study...Ch. 4.1 - Breast-cancer screening A study published in 2010...Ch. 4.1 - Experiment or observe? Explain whether an...Ch. 4.1 - Baseball under a full moon During a baseball game...
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