Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 8 - Hypothesis Testing - Review - Cumulative Review Exercises - Page 435: 6


a) $0.00195$, unlikely b) $0.0121$ c) $0.487$

Work Step by Step

a) We find that the probability is: $(0.125)^3=0.00195$ This is less than $1\%=0.01$, so the event is unlikely. b. We find that the probability is: $(0.125)(0.097)=0.0121 $ c. We first find the probability that they are all right handed: $0.875^5=0.513$ Thus, the probability that there is at least one that is left handed is: $1−0.513=0.487$
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