Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 5 - Section 5.4 - Assess Your Understanding - Applying the Concepts - Page 293: 17c

Answer

No, $P(more~likely~|~18~to~34)\lt P(more~likely)$.

Work Step by Step

N(18 to 34) = 542 and N(18 to 34 and more lilkely) = 238. $P(more~likely~|~18~to~34)=\frac{N(18~to~34~and~more~lilkely)}{N(18~to~34)}=\frac{238}{542}\approx0.439$ The sample space: 2160 randomly selected adult americans. So, N(S) = 2160. And N(more likely) = 1329. So: $P(more~likely)=\frac{N(more~likely)}{N(S)}=\frac{1329}{2160}=0.615$ We conclude that: $P(more~likely~|~18~to~34)\lt P(more~likely)$.
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