Essentials of Statistics (5th Edition)

Published by Pearson
ISBN 10: 0-32192-459-2
ISBN 13: 978-0-32192-459-9

Chapter 6 - Normal Probability Distributions - 6-3 Applications of Normal Distributions - Page 262: 19

Answer

110.

Work Step by Step

By using the table, the z-score belonging to the area 0.75: z=0.667. $IQ=mean+z\cdot(standard \ deviation)=100+0.667 \cdot 15=100+10=110.$
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