Answer
Stratified
Work Step by Step
It is stratified because the population was separated into smaller groups and was then surveyed randomly within each group.
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 12 - Data Analysis and Probability - 12-5 Samples and Surveys - Practice and Problem-Solving Exercises - Page 746: 28
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