Answer
From the plot in part (a), we can observe that there are no systematic change in variability as x changes, as the points are scattered randomly over and below the line.
Work Step by Step
See plot in part (a)
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 26 - Inference for Regression - Chapter 26 Exercises - Page 640: 26.36d
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