The Basic Practice of Statistics 7th Edition

Published by W. H. Freeman
ISBN 10: 1-46414-253-X
ISBN 13: 978-1-46414-253-6

Chapter 1 - Picturing Distributions with Graphs - Check Your Skills: 1.18

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%.
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