Answer
r = 0.914. since r is the square root of r squared and a square root is always positive. Moreover least square lines have a positive slope.
Work Step by Step
r squared = 83.6%, Hence:
$r = \sqrt 0.836 = 0.914$
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 5 - Regression - Chapter 5 Exercises - Page 155: 5.33d
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