Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 1 - Section 1.2 - Assess Your Understanding - Vocabulary and Skill Building - Page 20: 15

Answer

Experiment (designed experiment).

Work Step by Step

The experiment was planned. Groups were formed and the value of the explanatory variable (the treatment) was intentionally changed. Then, the value of the response variable (level of pain) for each group was recorded.
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