Answer
See below.
Work Step by Step
The percentage of adults of each province is based on a population (and not on a sample), thus it is possible to obtain $\mu$ from the data. Thus a confidence interval for $\mu$ makes no sense.
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 18 - Inference in Practice - Chapter 18 Exercises - Page 435: 18.32
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