**20**vi. Finds the difference between the two. vii. Compares the results to see whether the application of X treatment) caused a change in the experimental group. viii. Applies an appropriate statistical procedure.

2. Matched two group design. A matched two group design is a modification of the totally randomized two group design described above.

In this design, both groups are matched

in terms of some variable, the experimenter feels he would influence the dependent variable. Suppose we want to test the retention of two types of words closely associated and disassociated. We believe that IQ. Will influence how well a person can retain words so we match the two groups on IQ. Let us be more concrete to understand this point. Suppose there are ten subjects with IQ. as follows

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