Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 2 - Section 2.1 - Assess Your Understanding - Applying the Concepts - Page 78: 30b

Answer

Experiment (designed experiment).

Work Step by Step

Two groups were formed: the "traditional homework" group and the "online homework" group. The value of the explanatory variable (homework system) was intentionally changed. Then, the value of the response variable (exam scores) for each group was recorded.
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