Principles of Biology
Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 46, Problem 9TY
Summary Introduction

Introduction:

When a species is moved to a new location by humans, then such species are termed as the introduced species. These species are moved to different locations for various benefits and by different ways of transport. Sometimes, introduced species become invasive species. Invasive species are those species that spread in an area rapidly and affect the native species.

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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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Infectious Diseases - How do we control them?; Author: Let's Learn Public Health;https://www.youtube.com/watch?v=2JWku3Kjpq0;License: Standard Youtube License