Answer
a) No
b) Yes
Work Step by Step
a) It is a rule of thumb to always check the residual plot. There should be no pattern present.
b) Most of the variability has been demonstrated by the model.
Stats: Data and Models (3rd Edition)
by De Vaux, Richard D.; Velleman, Paul D.; Bock, David E.
Published by
Pearson
ISBN 10:
0321692551
ISBN 13:
978-0-32169-255-9
Chapter 9 - Regression Wisdom - Exercises - Page 230: 5
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