Answer
0.4052
Work Step by Step
To calculate $P(x̄ \geq 65.2)$, we need to find the z-score:
$z = \frac{x̄ - μ_{x̄}}{σ_{x̄}}$
$= \frac{65.2-64}{4.907}$ = 0.24
$P(z \geq 0.24) = 0.4052$, hence:
$P(x̄ \geq 65.2) = 0.4052$
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 - Vocabulary and Skill Building - Page 410: 17c
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