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Introduction to Nonparametric Analysis

Comparing k Dependent Samples

Friedman's test enables you to compare the locations of three or more dependent samples. You can obtain Friedman's Chi-square with the FREQ procedure by using the CMH2 option and SCORES=RANK and looking at the second CMH statistic in the output. For an example, see Chapter 28, "The FREQ Procedure"; this chapter also contains formulas and other details on the CMH statistics. For a discussion of how to use the RANK and GLM procedures to obtain Friedman's test, see Ipe (1987).

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