Elementary Statistics: Picturing the World (6th Edition)

Published by Pearson
ISBN 10: 0321911210
ISBN 13: 978-0-32191-121-6

Chapter 5 - Normal Probability Distributions - Section 5.3 Normal Distributions: Finding Values - Exercises - Page 258: 35

Answer

a) 7.75 hours b) between 5.43 hours and 6.77 hours See images attached for working

Work Step by Step

see images attached for working
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