Answer
c) $ -1 \leq r \leq 1$
Work Step by Step
Page 113 states that a correlation coefficient is always a number between -1 and 1.
The Basic Practice of Statistics 7th Edition
by Moore, David S.; Notz, William I.; Fligner, Michael A.
Published by
W. H. Freeman
ISBN 10:
146414253X
ISBN 13:
978-1-46414-253-6
Chapter 4 - Scatterplots and Correlation - Check Your Skills - Page 119: 4.18
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