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 4 - Probability and Counting Rules - 4-1 Sample Spaces and Probability - Extending the Concepts - Page 200: 41

Answer

a. $0.08$ b. $0.01$ c. $0.35$ d. $0.36$

Work Step by Step

The total frequency is 100. a. Between 31 and 40, $p=8/100=0.08$ b. Under 31, $p=1/100=0.01$ c. Over 30 and under 51, $p=(8+27)/100=0.35$ d. Under 31 or over 60, $p=(1+24+11)/100=0.36$
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