Quantile plots in the analysis of heteroscedastic models

• Autores: Montserrat Pepió Viñals, Carlos Polo Miranda
• Localización: Questiió: Quaderns d'Estadística, Sistemes, Informatica i Investigació Operativa, ISSN 0210-8054, Vol. 16, Nº. 1-3, 1992, págs. 135-145
• Idioma: inglés
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• Resumen

  • Recent developments in quality engineering methods have led to considerable interest in the analysis of variance, buiding a dispersion model, identifying important effects from replicated experiments and checking for significance by means of a half-normal plot. A methodology based on a chi-squared quantile plot is presented here for checking first the presence of heteroscedasticity, outliers and other data peculiarities, and after the estimation stage a new stepwise procedure tests for significant effects