Answer
Experiment
Work Step by Step
This is an experiment because the subjects were reacting to a person's anger. Therefore, the subjects were given treatments in order to measure their stress.
Essentials of Statistics (5th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0-32192-459-2
ISBN 13:
978-0-32192-459-9
Chapter 1 - Introduction to Statistics - 1-4 Collecting Sample Data - Page 32: 5
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