Elementary Statistics: Picturing the World (6th Edition)

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: 51

Answer

John Wayne: z ≈ 2.05; Gig Young: z ≈ 0.43; The age of John Wayne was about 2.05 standard deviation above the mean age of Best Actor winners, and the age of Gig Young was l0.43 standard deviation above the mean age of Best Supporting Actor winners. John Wayne’s age is unusual.

Work Step by Step

z = (x - μ) / σ z score between -2 and 2 is usual
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