Acceptable method of ensuring that experimental

Reference no: EM13508553

Which of these is not an acceptable method of ensuring that experimental and control groups are similar?

a. Encourage members of the control group and the experimental group to communicate freely with one another throughout the experiment
b.Match pairs of subjects on relevant variables, and assign one from each pair to each group
c.Assign subjects randomly to the experimental and control groups
d.Create groups that are equivalent in terms of their averages on some relevant variables

Reference no: EM13508553

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