Statistics: Informed Decisions Using Data (4th Edition)

by Sullivan III, Michael

Published by Pearson

ISBN 10: 0321757270

ISBN 13: 978-0-32175-727-2

Chapter 12 - Section 12.1 - Assess Your Understanding - Applying the Concepts - Page 598: 28a

Answer

$E(15~years~or~older~living~alone)=103.2$ $E(15~years~or~older~not~living~alone)=296.8$

Work Step by Step

$E(15~years~or~older~living~alone)=np=400\times0.258=103.2$ $E(15~years~or~older~not~living~alone)=n(1-p)=400\times(1-0.258)=296.8$

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