Elementary Statistics: Picturing the World (6th Edition)

Published by Pearson
ISBN 10: 0-32191-121-0
ISBN 13: 978-0-32191-121-6

Chapter 5 - Normal Probability Distributions - Section 5.1 Introduction to Normal Distributions and the Standard Normal Distribution - Exercises - Page 243: 25

Answer

Answer: P( z < -2.575) = 0.005

Work Step by Step

z = - 2.575 is between z = -2.57 and z= -2.58 P( z < -2.57) = 0.0051 P( z < -2.58) = 0.0049 Therefore, P( z < -2.575) = (0.0051 + 0.0049)/2 = 0.005
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