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 […]
Tag: equivalence test
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, […]