Most experimental tracks down for paranormal phenomena are statistical in nature. A subject repeatedly tackles a venture with a known probability of success due to chance, afterward the diagram of actual successes is equated to the chance expectation. If a subject scores evenly higher or smaller than the chance viewpoint later a many diagram of tackles, one can calculate the probability of such a score due purely to chance, and afterward assert, if the chance probability is sufficiently small, that the results are evidence for the existence of numerous equipment ...