Concept explainers
To select appropriate option.
Answer to Problem 20PT4
(b) it helps create roughly equivalent groups before treatments are imposed on the subjects.
Explanation of Solution
Given:
The options are:
(a) it is more fair to the subjects.
(b) it helps create roughly equivalent groups before treatments are imposed on the subjects.
(c) it allows researchers to generalize the results of their experiment to a larger population.
(d) it helps eliminate any possibility of bias in the experiment.
(e) it prevents the placebo effect from occurring.
Random assignment is a part of a well-designed comparative experiment because it helps create roughly equivalent groups before treatments are imposed on the subjects. That means, If there appears to be difference in treatment groups due to treatment themselves then that would be well-designed comparative experiment.
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