Answer
$0.9736$
Work Step by Step
Given $\mu=72, \sigma=6,n=15,X_1=75$, we have
$z=\frac{75-72}{6/\sqrt {15}}=1.9365$ and
$P(X\lt75)=P(z)=0.9736$
Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition
by Bluman, Allan
Published by
McGraw-Hill Education
ISBN 10:
0078136334
ISBN 13:
978-0-07813-633-7
Chapter 6 - The Normal Distribution - Chapter Quiz - Page 365: 28
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