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: 16

Answer

Observational study.

Work Step by Step

No attempt was made to influence the value of the explanatory variable (the conditions of the lake).
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