Exercise Physiology with Connect Access Card
Exercise Physiology with Connect Access Card
9th Edition
ISBN: 9781259581199
Author: Powers, SCOTT, Howley, Edward
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 18, Problem 7SA
Summary Introduction

To identify and describe: The following methods of measuring body composition: isotope dilution, potassium 40, ultrasound, bioelectrical impedance analysis, dual energy X-ray absorptiometry, skinfold thickness, and underwater weighing.

Introduction: Body Mass Index (BMI) is the approximate measure that is used to determine whether a person is overweight or underweight. It is obtained by dividing the weight of the person in kilograms by the square of the height in meters. The major limitation of the height or weight tables is that it is not possible to know whether the person is heavily muscled or over fat simply.

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Q8. A researcher wants to study the effectiveness of a pill intended to reduce stomach heartburn in pregnant women. The researcher chooses randomly 400 women to participate in this experiment for 9 months of their pregnancy period. They all need to have the same diet. The researcher designs two groups of 200 participants: One group take the real medication intended to reduce heartburn, while the other group take placebo medication. In this study what are: Independent variable: Dependent variable: Control variable: Experimental group: " Control group: If the participants do not know who is consuming the real pills and who is consuming the sugar pills. This study is It happens that 40% of the participants do not find the treatment helpful and drop out after 6 months. The researcher throws out the data from subjects that drop out. What type of bias is there in this study? If the company who makes the medication funds this research, what type of bias might exist in this research work?
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