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: 16

Answer

mean 6.5 modal class 0.8–4.4 No.The mean is not the best average for this set of data because the modal class is the lowest class, and most of the data were clustered on the left side of the total data range.

Work Step by Step

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