Which of the following occurs when you see changes in an outcome because randomization was not used to form the groups and the groups were not equivalent at the outset?

Name: Which of the following occurs when you see changes in an outcome because randomization was not used to form the groups and the groups were not equivalent at the outset?
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Question

Quizplus · Accepted Answer

Selection bias occurs when randomization is not used to form groups, leading to non-equivalent groups at the outset, which can affect the outcome.

Which of the Following Occurs When You See Changes in an Outcome