Answer
The sampling method is sound.
Work Step by Step
Not only is it run by a trusted pollster, Harris Interactive, but those questioned are picked randomly, ensuring diversity of opinion.
Elementary Statistics (12th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0321836960
ISBN 13:
978-0-32183-696-0
Chapter 1 - Introduction to Statistics - 1-2 Statistical and Critical Thinking - Basic Skills and Concepts - Page 12: 11
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