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When people receive a treatment, they have a tendency to believe it affected them in some way, even when it did not. This is called the placebo effect.
Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition
by Bluman, Allan
Published by
McGraw-Hill Education
ISBN 10:
0078136334
ISBN 13:
978-0-07813-633-7
Chapter 1 - The Nature of Probability and Statistics - 1-4 Experimental Design - Exercises - Page 24: 10
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