You are reviewing data on a clinical trial of 50-70-year-olds, on the effects of a vitamin supplement on arthritis. In the general population for this age range, 35% of the people have some arthritis symptoms. In the clinical trial of 500 people, they find that 170 have some arthritis symptoms. What do you conclude about the efficacy of the vitamin supplement? (Show relevant work)

You are reviewing data on a clinical trial of 50-70-year-olds, on the effects of a vitamin supplement on arthritis. In the general population for this age range, 35% of the people have some arthritis symptoms. In the clinical trial of 500 people, they find that 170 have some arthritis symptoms. What do you conclude about the efficacy of the vitamin supplement? (Show relevant work)

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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There have been many studies recently concerning coffee drinking and cholesterol level. While it is known that several coffee-bean components can elevate blood cholesterol level, it is thought that a new type of paper coffee filter may reduce the presence of some of these components in coffee. The effect of the new filter on cholesterol level will be studied over a 10-week period using 300 nonsmokers who each drink 4 cups of caffeinated coffee per day. Each of these 300 participants will be assigned to one of two groups: the experimental group, who will only drink coffee that has been made with the new filter, or the control group, who will only drink coffee that has been made with the standard filter. Each participant’s cholesterol level will be measured at the beginning and at the end of the study. Describe an appropriate method for assigning the subjects to the two groups so that each group will have an equal number of subjects. In this study, the researchers chose to include a…
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