Answer
93.0
Work Step by Step
We have $\mu=122.6,\sigma=18$.
To find the cutoff score, $P(z1)=0.05, z1=-1.645$ (use Table E)
$z1=\frac{X1-122.6}{18}=-1.645, X1=92.99\approx93.0$
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 - 6-2 Applications of the Normal Distribution - Exercises 6-2 - Page 339: 22
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