Answer
ANOVA test.
Work Step by Step
We are interested in the significant difference between three groups' means, thus we use the ANOVA test.
The Basic Practice of Statistics 7th Edition
by Moore, David S.; Notz, William I.; Fligner, Michael A.
Published by
W. H. Freeman
ISBN 10:
146414253X
ISBN 13:
978-1-46414-253-6
Chapter 27 - One-Way Analysis of Variance: Comparing Several Means - Chapter 27 Exercises - Page 675: 27.43b
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