Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 7 - Review - Review Exercises - Page 394: 11f

Answer

Normal intelligence: intelligence score between 70 and 130.

Work Step by Step

The middle 95% is between $μ-2σ=100-2\times15=70$ and $μ+2σ=100+2\times15=130$
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