| Article ID: | iaor20011598 |
| Country: | Cuba |
| Volume: | 21 |
| Issue: | 3 |
| Start Page Number: | 224 |
| End Page Number: | 235 |
| Publication Date: | Sep 2000 |
| Journal: | Revista de Investigacin Operacional |
| Authors: | Ojeda Mario Miguel, Cerrillo Sergio Francisco Jurez |
| Keywords: | graphical methods |
This paper presents 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.