Answer
$P(x < 250) = 0.1587$
Work Step by Step
$\mu$ = 266, $\sigma$ = 16
Want to find $P( x < 250 )$
i) Convert 250 to a z-score:
z = $\frac{x - \mu}{\sigma}$
z = $\frac{250 - 266}{16}$
z= -1
ii) $P(x < 250) = P(z < -1) = 0.1587$
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 7 - Section 7.2 - Assess Your Understanding - Applying the Concepts - Page 378: 41b
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