Answer
See below.
Work Step by Step
The biggest weaknesses of the survey are that it excludes people who have no phones or only have cell-phone service.
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 - Chapter 22 Exercises - Page 533: 22.25a
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