Other software products claim to employ exact statistic. How is XPro different from these programs?
XPro is the world’s only software package specializing in Exact Parametric Methods such as those in ANOVA, Mixed Models, Repeated Measures, Growth Curves, MANOVA, and Regression. XPro procedures are complimentary to such program as StatXact which specialize in exact non-parametric methods, such as those dealing with contingency tables and categorical data. Most programs provides exact parametric methods only under assumptions such as the assumption of equal variances in ANOVA. In addition to such classical procedures, XPro provides procedures based on milder assumptions. To make this possible XPro performs high dimensional numerical integrations and solve highly nonlinear equations. The complexities of the underlying formulas make the problem of computing exact p-values and confidence limits very tedious. XPro makes use of efficient algorithms tailor made for exact inferences in linear models and provides an easy to use interface that facilitates all necessary analyses without passing
