In an experiment that includes a pretest and posttest, describe a statistical technique that can be used to reduce initial group differences resulting from nonrandom assignment of research participants to the experimental and control treatments. Indicate the function of the pretest and posttest in thestatistical technique.

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The Answer of In an experiment that includes a pretest and posttest, describe a statistical technique that can be used to reduce initial group differences resulting from nonrandom assignment of research participants to the experimental and control treatments. Indicate the function of the pretest and posttest in thestatistical technique.

In an Experiment That Includes a Pretest and Posttest, Describe