Environmental Science for AP* (2nd Edition)

Published by W. H. Freeman
ISBN 10: 1464108684
ISBN 13: 978-1-46410-868-6

Chapter 1 - Module 3 - Scientific Method - AP Review Questions - Page 25: 5


(d) a group with the same conditions as the experimental group except for the study variable.

Work Step by Step

When using a controlled group, the scientists can determine if an observed effect is the result of the experimental treatment, or if the effect is something else from the environment to which all the subject have been exposed to.
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