Elementary Statistics: Picturing the World (6th Edition)

by Larson, Ron; Farber, Betsy

Published by Pearson

ISBN 10: 0321911210

ISBN 13: 978-0-32191-121-6

Chapter 2 - Descriptive Statistics - Section 2.5 Measures of Position - Exercises - Page 112: 41

Answer

(a) z ≈ 1.15 (b) An age of 32 is about 1.15 standard deviations above the mean. (c) Not unusual

Work Step by Step

z = (x - μ) / σ = (32-28.1) / 3.4 = 1.15 Usual values have z score in the range -2 and 2.

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