That reference was also for computing the difference. You can find it again by Googling hodges lehmann nist dataplot (It's not SAS software. DataPlot is a software platform provided by the NIST).
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I hope that SAS9.4/STAT12.2 adds additional Monte Carlo capabilities to PROC FREQ. It seems rather unusual to provide exact solutions, but not have an alternative for large, sparse datasets of the h x 2 x 2 variety. Steve Denham
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I think that the PROC SAS to do that does not exist yet but i found an article (http://www.childrens-mercy.org/stats/weblog2004/OrdinalLogistic.asp) where there is the formula to calculate the sample size.
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