Answer
See below.
Work Step by Step
The data pairs belong to different years, so we can assume that the years are independent.
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: 26.36c
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