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Introduction to Nonparametric Analysis

Obtaining Ranks

The primary procedure for obtaining ranks is the RANK procedure in base SAS software. Note that the PRINQUAL and TRANSREG procedures also provide rank transformations. With all three of these procedures, you can create an output data set and use it as input to another SAS/STAT procedure or to the IML procedure. See the SAS Procedures Guide for information on the RANK procedure, and see the chapters in this book for information on the PRINQUAL and TRANSREG procedures.

In addition, you can specify SCORES=RANK in the TABLES statement in the FREQ procedure. PROC FREQ then uses ranks to perform the analyses requested and generates nonparametric analyses.

For more discussion of using the rank transform, see Iman and Conover (1979), Conover and Iman (1981), Hora and Conover (1984), Iman, Hora, and Conover (1984), Hora and Iman (1988), and Iman (1988).

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