Answer
Not an experiment.
Work Step by Step
This is not an experiment because nothing was manipulated. The researchers are just looking at a difference in two pre-existing groups.
Essentials of Statistics for the Behavioral Sciences 8th Edition
by Gravetter, Frederick J.; Wallnau, Larry B.
Published by
Cengage Learning
ISBN 10:
1133956572
ISBN 13:
978-1-13395-657-0
Chapter 1 - Introduction to Statistics - Problems - Page 33: 11
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