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Without random assignment, which of the following can happen?

1.
Naturally occurring confounding variables can result in an apparent relationship between the explanatory and response variables.

2.
The results may not be able to be extended to a larger population.

3.
Many people in the study will drop out because they aren’t happy with the treatment they were assigned to. This will cause bias in the results.

4.
None of the above

Respuesta :

metchelle
The correct answer for the given question above would be the second option, option 2. Without random assignment, what might happen is that, the results may not be able to be extended to a larger population. Proper assignment is necessary in order to trace up the progress and the development of the task. Hope this is the answer that you are looking for.

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