Answer
$49.98\%$
Work Step by Step
From the normal curve table, the area to the right of $z=3.5$ is $0.9998$
Therefore, the area to the right is $P(0\lt Z \lt 1.68)=0.9998-0.5=0.4998$
The proportion is $0.4998$ or $49.98\%$
Calculus with Applications (10th Edition)
by Lial, Margaret L.; Greenwell, Raymond N.; Ritchey, Nathan P.
Published by
Pearson
ISBN 10:
0321749006
ISBN 13:
978-0-32174-900-0
Chapter 11 - Probability and Calculus - 11.3 Special Probability Density Functions - 11.3 Exercises - Page 597: 7
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