Elementary Statistics (12th Edition)

Published by Pearson

Chapter 6 - Normal Probability Distributions - Review - Chapter Quick Quiz - Page 315: 6

0.1611

Work Step by Step

$z=\frac{value-mean}{standard \ deviation}=\frac{4.2-4.577}{0.382}=-0.99.$ Using the table, the probability of z being less than 0.99 is: 0.1611.

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