PRINCIPLES OF LIFE:DIGITAL UPDATE
PRINCIPLES OF LIFE:DIGITAL UPDATE
3rd Edition
ISBN: 9781319450298
Author: HILLIS
Publisher: MAC HIGHER
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Chapter 16.4, Problem 1TK
Summary Introduction

To explain: The hydrocarbons showing a pattern that is consistent with reinforcement.

Introduction: Different species of Drosophila have different concentrations of hydrocarbons present on their cuticles, which serve as reproductive signals. The amount of hydrocarbon may be the signal for selection in mating process.

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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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