In well-designed studies subjects are assigned ______ to treatment and control groups.

Name: In well-designed studies subjects are assigned ______ to treatment and control groups.
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Random assignment ensures that each participant has an equal chance of being assigned to either the treatment or control group, which minimizes the risk of bias and confounding variables. Arbitrary, haphazard, and sequential assignment methods are more prone to bias and are not recommended in well-designed studies.

In Well-Designed Studies Subjects Are Assigned ______ to Treatment and Control