Looking for some help /sci/ . Lets say you have 10,000 measurements of an object. The object is labeled A or B based on this measurement. There is a number for that measurement which is a decision point. If the measurement is below the decision point the object is labeled A, and if it is above it is labeled B.

How would you statistically and visually depict whether this decision point is correct? How would you identify a better decision point?