is about is_specified_input_of statistical model Bayesian model selection ratio Bayes factor Orlaith Burke Alejandra Gonzalez-Beltran Bayes factor is a ratio between 2 probabilities of observing data according 2 distinct models. It is used in Bayes model selection to evaluate which model best explains the data. if K<0, the model used in the denominator term is supported, if K>1, the model used in the numerator term is supported. The Bayes factor is about the plausibility of 2 different models Philippe Rocca-Serra adapted from Wikipedia last accessed 2013-11-13 ready for release