Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 2 - Summarizing and Graphing Data - 2-2 Frequency Distributions - Basic Skills and Concepts - Page 52: 13

Answer

4, 7, 18.

Work Step by Step

The lower two frequencies are the same as the first two frequencies, so they are 7 and 4. Now we have to find the peak frequency, which can simply be done by subtracting the sum of the frequencies we know(4+7+7+4=22) form the total (40). Therefore the peak frequency is 40-22=18.
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