Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321755936
ISBN 13: 978-0-32175-593-3

Chapter 2 - Methods for Describing Sets of Data - Exercises 2.1 - 2.21 - Learning the Mechanics - Page 33: 2.5d

Answer

Please see the attached picture for the answer.

Work Step by Step

Pie charts are prepared by finding the relative frequencies of all classes. X's shaded portion = 0.4 $\times$ 360 = 144 Degrees. Y's shaded portion = 0.45 $\times$ 360 = 162 Degrees Z's shaded portion = 0.15 $\times$ 360 = 54 Degrees.
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