Maximally Selected Chi Square Statistics

This is the authors' abstract. We don't add key points for this paper.

Two samples can be compared by selecting a cut point and then forming a 2 x 2 table of the numbers of observations above and below the cut point in each sample. When the cut point is selected so as to maximize the standard chi square statistic, the chi square percentile points are inappropriate. Actual significance levels are computed for large samples, and correct percentile pOilltS are tabulated.