2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/165954We describe a statistical hypothesis test for the presence of a signal based on the likelihood ratio statistic. We derive the test for a special case of interest. We study extensions of the test to cases where there are multiple channels and to marked Poisson distributions. We show the results of a number of performance studies which indicate that the test works very well, even far out in the tails of the distribution and with multiple channels and marked Poisson.21 pages, 6 figuesData Analysis, Statistics and Probabilitytext