1. A method for determining a relationship between biological predictors and a phenotype, the method implemented at least in part by a computer, the method comprising: obtaining data regarding a set of biological predictors; obtaining an indication of the phenotype; training a probabilistic predictor on one portion of the data to predict the phenotype based on the set of biological predictors; applying the probabilistic predictor to a second portion of the data to produce predictive probabilities of the phenotype for the second portion of the data; and using statistical significance between an aspect of the predictive probabilities and actual phenotype observations to summarize the relationship between the set of biological predictors and the phenotype.