Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 1, The Science of Biology - 1.1 - What is Science? - 1.1 Assessment - Page 9: 2b

Answer

A hypothesis is critical to a controlled experiment because it is needed to predict the experiment's outcome. The hypothesis allows you to have an idea about which specific factors would affect your experiment's outcome, thus allowing you to only focus on testing one variable at a time.

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