2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/35987Data analysis is the application of probability and statistics to draw inference from observation. Is a signal present or absent? Is the source an inspiraling binary system or a supernova? At what point in the sky is the radiation incident from? In these notes I want to address how two different statistical methodologies --- Bayesian and Frequentist --- approach the problem of statistical inference12 pages, LaTeX, sprocl.sty, to appear in the Proceedings of the Second Eduardo Amaldi Meeting, 1-4 July 1997General Relativity and Quantum Cosmologytext