Answer
Lower.
Work Step by Step
Individual observations have more variation than the sample means, and the data won't be so linear if the variation is larger, thus the linear correlation coefficient will decrease.
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 - Apply Your Knowledge - Page 147: 5.14
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