Elementary Statistics: Picturing the World (6th Edition)

Published by Pearson
ISBN 10: 0-32191-121-0
ISBN 13: 978-0-32191-121-6

Chapter 2 - Descriptive Statistics - Section 2.5 Measures of Position - Exercises - Page 112: 44

Answer

(a) z = -2.38 (b) An age of 20 is -2.38 standard deviations below the mean. (c) Unusual

Work Step by Step

z = (x - μ) / σ = (20-28.1) / 3.4 = -2.38 Usual values have z score in the range -2 and 2
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