The Basic Practice of Statistics 7th Edition

Published by W. H. Freeman
ISBN 10: 146414253X
ISBN 13: 978-1-46414-253-6

Chapter 9 - Producing Data: Experiments - Chapter 9 Exercises - Page 248: 9.32c

Answer

If the control group arrived at the same moment as the running group, then the experimenters were sure that the students did not go exercising in the morning before breakfast. This control group is necessary, for a group to compare the experimental group to is needed.

Work Step by Step

If the control group arrived at the same moment as the running group, then the experimenters were sure that the students did not go exercising in the morning before breakfast. This control group is necessary, for a group to compare the experimental group to is needed.
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