Introduction To Statistics And Data Analysis
6th Edition
ISBN: 9781337793612
Author: PECK, Roxy.
Publisher: Cengage Learning,
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Textbook Question
Chapter 2.3, Problem 51E
Red wine contains flavonol, an antioxidant thought to have beneficial health effects. But to have an effect, the antioxidant must be absorbed into the blood. The article “Red Wine is a Poor Source of Bioavailable Flavonols in Men” (The Journal of Nutrition [2001]: 745–748) describes a study to investigate three sources of dietary flavonol—red wine, yellow onions, and black tea—to determine the effect of source on absorption. The article included the following statement:
We recruited subjects via posters and local newspapers. To ensure that subjects could tolerate the alcohol in the wine, we only allowed men with a consumption of at least seven drinks per week to participate… Throughout the study, the subjects consumed a diet that was low in flavonols.
- a. What are the three treatments in this experiment?
- b. What is the response variable?
- c. What are three extraneous variables that the researchers chose to control in the experiment?
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Suppose a researcher is interested inthe effectiveness in a new childhood exercise program implemented in a SRS of schools across a particular county. In order to test the hypothesis that the new program decreases BMI (Kg/m2), the researcher takes a SRS of children from schools where the program is employed and a SRS from schools that do not employ the program and compares the results. Assume the following table represents the SRSs of students and their BMIs.
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Chapter 2 Solutions
Introduction To Statistics And Data Analysis
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