Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 1 - Introduction to Statistics - 1-4 Collecting Sample Data - Basic Skills and Concepts - Page 32: 7

Answer

Observational study.

Work Step by Step

The therapists did not get any treatment and were only observed for their reactions. Therefore it is an observational study.
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