Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321755936
ISBN 13: 978-0-32175-593-3

Chapter 5 - Continuous Random Variables - Exercises 5.53 - 5.72 - Applying the Concepts - Advanced - Page 251: 5.71

Answer

There is no possible value for $x\lt0$. We must conclude that the probability distribution is skewed right (not symmetric). Hence, it is not normal.

Work Step by Step

$\mu=13.2$ $s=19.5$ If $x=0$ $z=\frac{x-\mu}{\sigma}=\frac{0-13.2}{19.6}=-0.67$
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