Tag: equivalence test

Noninferiority Testing with SAS

I planed to extend nonWinferiority testing to one of my statistical notes,  Equivalence Testing and TOST (Two One-Sided Test) since noninferiority test is simply half part of the equivalence test. Today I’m glad to find an even better explanation from SAS Usage Note 48616: Design and analysis of noninferiority studies You will love it if […]

Statistical Notes (2): Equivalence Testing and TOST (Two One-Sided Test)

Programmers Need to Learn Statistics Or I will Kill Them All –Zed A. Shaw In an equivalence testing example against lognormal data,  a TOST (Two One-Sided Test)  option used in SAS TTEST procedure: proc ttest data=auc dist=lognormal tost(0.8, 1.25);    paired TestAUC*RefAUC; run; And the output: Since the 90% (who not 95%? see below) limit of […]

Statistical Notes (1): Geometric Mean and Geometric Mean Ratio

Programmers Need to Learn Statistics Or I will Kill Them All –Zed A. Shaw Just read since SAS 9.2, the TTEST procedure also natively supports Equivalence Test by simply adding a TOST option (Two one-sided tests). In a example, TTEST procedure reports a geometric mean as 0.9412, which is the geometric mean of a ratio, […]