Sign test

In statistics, the sign test can be used to test the hypothesis that there is "no difference" between the continuous distributions of two random variables X and Y. Formally: Let p = Pr(X > Y), and then test the null hypothesis H0: p = 0.50. This hypothesis implies that given a random pair of measurements (xi, yi), then xi and yi are equally likely to be larger than the other.
See more at Wikipedia.org...