Programming the statistical procedures from SAS

Error in PROC TTEST (SAS v9) for equivalence testing

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Error in PROC TTEST (SAS v9) for equivalence testing

The result of equivalence testing on normal ratios is wrong in some constellation of the data as I had reported to SAS earlier.

E.g. for the ratio of the two mean values -4 and -4 the equivalence test may not give the same results as for the ratio of the two mean values +4 and +4.

SAS has now published a Note where the details are described:
http://support.sas.com/kb/42/698.html
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