Concept explainers
(a)
To explain how the three principles of experimental design were addressed in the study.
(a)
Explanation of Solution
Replication: each of the treatments is replicated
Randomization: the study says that the subjects were randomly assigned to the two treatments.
Local control: There were multiple treatments, improving the quality of the experiment.
(b)
To explain the meaning of the sentence given in the question.
(b)
Explanation of Solution
This means that the difference in the number of women who were pregnant between the two treatments did not occur because of chance.
(c)
To explain why can’t we conclude that acupuncture caused the difference in pregnancy rates.
(c)
Explanation of Solution
We cannot say that acupuncture caused the increase in pregnancy rates because there may be confounding variables in this study.
Chapter 6 Solutions
Statistics Through Applications
Additional Math Textbook Solutions
Introductory Statistics (2nd Edition)
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Essentials of Statistics, Books a la Carte Edition (5th Edition)
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