Answer
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Work Step by Step
The survey excludes northern residents and also people who have no phones. These are the biggest weaknesses of this survey.
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 22 - Inference about a Population Proportion - Apply Your Knowledge - Page 523: 22.5a
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