Symmetric Tests of the Hypothesis that the Mean of One Normal Population Exceeds That of Another
One of the most commonly recurring statistical problems is to determine, on the basis of statistical evidence, which of two samples, drawn from different universes, came from the universe with the larger mean value of a particular variate. Let M y be the mean value which would be obtained with universe (Y) and M x be the mean value which would be obtained with universe (X). Then a test may be constructed [1] for the hypothesis M y ≥ M X.