Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 1 - Introduction to Statistics - Review - From Data To Decision - Page 40: 3

Answer

Cluster sampling should have been used.

Work Step by Step

The best would have been if the USA was portioned into different regions. Then, using the different regions, two people could have been randomly selected from different regions, and then it could have been seen if the person from the first region could contact the person from the second region. Finally, if the person from the first region could contact the other, he would have eliminated the problem of certain regions being more connected than others.
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