Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 1 - Section 1.4 - Assess Your Understanding - Vocabulary and Skill Building - Page 37: 18

Answer

Stratified sampling.

Work Step by Step

Each of the five classes is a strata. Then, from each strata, a simple random sample was obtained. Thus, this is stratified sampling.
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