The purpose of the placebo is: (a) To prevent participants from knowing whether they belong to the
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The purpose of the placebo is:
(a) To prevent participants from knowing whether they belong to the treatment group or the control group;
(b) To distinguish between the cases and the controls in a case-control study;
(c) To determine whether pulse rates are affected by participation in the trial.
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Statistical Reasoning For Everyday Life
ISBN: 978-0134494043
5th Edition
Authors: Jeff Bennett, William Briggs, Mario Triola
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