from the conferences organized by TANGER Ltd.
The paper deals with modelling processes the output of which is affected by both continuous quantitative variables and qualitative variables. Three examples working with simulated data show how to perform regression involving one or two qualitative variables. The paper also shows a simple approach to assessing model correspondence, using a test of the absolute terms of regression functions.
Keywords: design of experiments, regression function, nominal and continuous variables© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.