Answer
121 dollars
Work Step by Step
Mean = 95 dollars, standard deviation = 20 dollars
Area to the left of the x value = .1
From Table IV, this value of z= 1.28
Thus, it follows:
x = μ+zσ = 95+(1.28)(20) = 121 dollars
Introductory Statistics 9th Edition
by Mann, Prem S.
Published by
Wiley
ISBN 10:
1-11905-571-7
ISBN 13:
978-1-11905-571-6
Chapter 6 - Section 6.4 - Determining the z and x Values When an Area Under the Normal Distribution Curve Is Known - Exercises - Page 256: 6.41
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