90% CI [General Sta­tis­tics]

posted by ElMaestro  – Denmark, 2012-02-13 09:07 (5244 d 02:35 ago) – Posting: # 8115
Views: 6,607

Hello Rana,

❝ Why only 90% Confidence Interval is being used in generally to prove bioequivalence..why can't 80% or 70% ??? What is rationale behind this?


Generally in statistics an alpha of 5% is considered appropriate. Whether this alpha level is appopriate or not is of course also a good question, but it has stuck for years and seems to be the tradition now. When that alpha is applied in the equivalence world it implies a 90% CI (1-2*alpha, two-sided).

Pass or fail!
ElMaestro

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