Principles of Biology
Principles of Biology
2nd Edition
ISBN: 9781260081848
Author: Robert Brooker
Publisher: Mcgraw-hill Higher Education (us)
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Chapter 42, Problem 1CBQ
Summary Introduction

To analyze:

The means of communication among different organisms.

Introduction:

Communication can be described as exchanging of information with other animals. Thorugh the different ways of communication, organism interact with each other and tell them about the changes in the environment or any stimuli they observe.

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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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