The random group is a preexperimental design in which a group of test units is measured before and after exposure to the treatment.

Name: The random group is a preexperimental design in which a group of test units is measured before and after exposure to the treatment.
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The random group design is an experimental design, not a preexperimental design. In a preexperimental design, there is typically no control group, whereas in an experimental design, there is a control group for comparison.

The Random Group Is a Preexperimental Design in Which a Group