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 3 - Review - Test - Page 186: 7

Answer

$x ̅_w=2.17~dollars$

Work Step by Step

$x ̅_w=\frac{Σw_ix_i}{Σw_i}=\frac{2\times2.70+1\times1.30+\frac{1}{2}\times1.80}{2+1+\frac{1}{2}}=2.17$

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