Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

Published by McGraw-Hill Education
ISBN 10: 0078136334
ISBN 13: 978-0-07813-633-7

Chapter 3 - Data Description - 3-1 Measures of Central Tendency - Exercises 3-1 - Page 124: 14


mean 17.68 modal class 2.48–7.48 and 17.51–22.51 The mean of these grouped data is smaller than that of the U.S. mean of $21.97.

Work Step by Step

mean=Sum(midpoint*frequency)/Count The modal class is the class with the largest frequency.
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