Statistics: Informed Decisions Using Data (4th Edition)

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

Chapter 14 - Section 14.2 - Assess Your Understanding - Applying the Concepts - Page 698: 17k

Answer

$s_{b_1}=10.966$

Work Step by Step

$s_e=269.049$ (item (i)) To find $s_x$: Using the EXCEL, enter the Size values in the column A. In A10 enter "=STDEV.S(A1:A9)" $s_x=8.6747$ $s_{b_1}=\frac{s_e}{\sqrt {∑(x_i-x ̅)^2}}=\frac{s_e}{\sqrt {n-1}s_x}$ (see note on page 684) $s_{b_1}=\frac{269.049}{\sqrt {9-1}\times8.6747}=10.966$
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