Answer
(c) 65%
Work Step by Step
Teens from schools that forbid cell phones brought their cell phone to school every day=97
Teens from schools that forbid cell phones=150
$97/150 \approx 0.65 = 65 %$
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 6 - Two-Way Tables - Check Your Skills - Page 174: 6.12
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