Statistics, 4th Edition

Published by W. W. Norton & Company
ISBN 10: 0393929728
ISBN 13: 978-0-39392-972-0

Chapter 1 - Part 1 - Design of Experiments - Exercise Set A - Page 20: 4

Answer

False

Work Step by Step

The areas were selected based on the rate of polio. Therefore the ratio of polio in the experimental areas was higher before the conduction of the experiment.
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