AN IMPROVEMENT ON COMMONLY USED TESTS IN BIOEQUIVALENCE ASSESSMENT

If equivalence of two treatments has to be proved by an experiment wit h normally distributed observations and fixed sample size, there are t wo usual methods. On the one hand, there is the double t test and, on the other hand, a test procedure suggested by Anderson and Hauck, whic h is uniformly more powerful than the first one but only capable of ke eping asymptotically to the nominal level. Based on these two methods a new test is presented, which is uniformly more powerful than the dou ble t test and also keeps the preassigned level.