Introduction to Statistics and Data Analysis
5th Edition
ISBN: 9781305445963
Author: PECK
Publisher: Cengage
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Chapter 2.3, Problem 47E
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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Objective 1. to determine whether there is a…
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clinical trial studied this question with 864 people who were at risk for colon cancer. The subjects were divided into four
groups: daily beta-carotene, daily vitamins C and E, all three vitamins every day, and daily placebo. After four years, the
researchers were surprised to find no significant difference in colon cancer among the groups.
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Explanatory variable
Response variable
Answer Bank
development of colon cancer
vitamin regimen
the sample size
quantity of fruits and vegetables consumed
Chapter 2 Solutions
Introduction to Statistics and Data Analysis
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