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: 49

Answer

Robert Duvall: z ≈ 1.02; Jack Nicholson: z ≈ -0.28; The age of Robert Duvall was about 1 standard deviation above the mean age of Best Actor winners, and the age of Jack Nicholson was less than 1 standard deviation below the mean age of Best Supporting Actor winners. Neither actor’s age is unusual.

Work Step by Step

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