Statistics Through Applications
Statistics Through Applications
2nd Edition
ISBN: 9781429219747
Author: Daren S. Starnes, David Moore, Dan Yates
Publisher: Macmillan Higher Education
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Chapter 3.2, Problem 3.46E
To determine

To find: the IQ score was at 98th percentile.

Expert Solution & Answer
Check Mark

Answer to Problem 3.46E

130.75

Explanation of Solution

Given:

98th percentile =98%

  μ=100σ=15

Formula used:

  z=xμσ

Calculation:

Z-score corresponding to 98% = 0.98

z=2.05

  z=xμσ2.05=x1001530.75=x100x=130.75

The score is 130.75 or about 131

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