Answer
See below.
Work Step by Step
The adjusted $R^2$ value takes into consideration the number of predictor variables, whilst the $R^2$ value doesn't, hence it is better to use the adjusted $R^2$ value.
Elementary Statistics (12th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0321836960
ISBN 13:
978-0-32183-696-0
Chapter 10 - Correlation and Regression - 10-5 Multiple Regression - Basic Skills and Concepts - Page 548: 3
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