The Basic Practice of Statistics 7th Edition

Published by W. H. Freeman
ISBN 10: 146414253X
ISBN 13: 978-1-46414-253-6

Chapter 17 - Tests of Significance: The Basics - Apply Your Knowledge - Page 400: 17.10

Answer

Something likely caused the difference between means.

Work Step by Step

The P value is less than .001. This value means there is a less than .01 percent change of a difference in the means. Since the probability is close to 0, it is unlikely to get the same result again if it was truly random chance. Thus, something likely caused the difference between means.
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