Answer
(b) 80%
Work Step by Step
There are an even amount of entries, 50, so the midpoint will be the average of the two middle entries (the 25th and the 26th entries). Since both of these entries are 80%, the average is 80%.
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 1 - Picturing Distributions with Graphs - Check Your Skills - Page 37: 1.19
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