MANILA, Philippines — Every strategy rests on assumptions. The problem is that once a strategy is approved, those assumptions can disappear from view. Imagine the Philippine government announcing that ...

An ordinal outcome carries more information than a nominal one, and less than a continuous one — and the model has to match that middle ground exactly, or it either throws information away or invents ...

Regression analysis is the statistical technique for estimating how one or more predictor variables relate to an outcome variable, expressed as an equation you can use to describe, and sometimes ...

Classification and regression tree (CART) analysis recursively partitions observations in a matched data set, consisting of a categorical (for classification trees) or continuous (for regression trees ...

Commonly used linear regression focuses only on the effect on the mean value of the dependent variable and may not be useful in situations where relationships across the distribution are of interest.