Answer
57.4 seconds
Work Step by Step
p = 0.15. Using Table V of the book, we have:
z = -1.04
$σ_{x̅} = \frac{σ}{\sqrt n} = \frac{13.1}{50} = 1.85$
$z = \frac{x̅ - μ_{x̅}}{σ_{x̅}}$
$x = zσ_{x̅} + μ_{x̅} = -1.04 \times 1.85 + 59.3 = 57.4$
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 8 - Section 8.1 - Assess Your Understanding - Applying the Concepts - Page 412: 26c
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