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 - Extending the Concepts - Page 127: 38

Answer

5.5

Work Step by Step

Find the quadratic mean of 8, 6, 3, 5, and 4. Apply the formula: quadratic mean=$\sqrt {\frac{8^2+6^2+3^2+5^+4^2}{5}}=5.5$
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