BIPLOTS PARA LOS RESIDUOS DEL SEGUNDO NIVEL DE UN MODELO LINEAL JERARQUICO CON DOS NIVELES

Abstract

This paper a general formulation of a two level hierarchical linear model. In the second level, the model is reformulated as a multivariate linear model, obtaining a matrix of residuals for this level. The biplot is proposed as a graphical tool that helps for multivariate outliers detection. This proposal is illustrated with one example.