Revisitando los modelos Anova y Ancova
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[ES] El objetivo de este trabajo será analizar que ocurre cuando fallan las hipótesis del modelo ANOVA y ANCOVA, las cuales son la homogeneidad de varianzas, la normalidad y
la independencia de observaciones. Con este objetivo en mente, primero introduciremos los
modelos y las herramientas que utilizaremos en el estudio de simulación, para posteriormente, ponerlo en práctica.
Así comenzaremos a evaluar en términos de calibrado y potencia el comportamiento
del test F en los escenarios en los que se cumplan una mayor cantidad de hipótesis. Posteriormente, iremos suprimiendo estás hipótesis y compararemos los resultados obtenidos
con los resultados de los escenarios originales. Finalmente, extraeremos conclusiones del
estudio de simulación de los modelos ANOVA y ANCOVA
[EN] The objective of this dissertation is to analyze what happens when the hypothesis of the ANOVA and ANCOVA models fail. These hypotheses are variance homogeneity, normality and independence of the observations. With this goal on mind, we will introduce first the models and the statistic tool that we will use in the simulation study. Secondly, we will show the performance in practice. Thus, we will begin to evaluate the behaviour of the F test in terms of calibration and power in the scenarios, fulfilling totally the required hypothesis. Then, some scenarios relaxing this assumptions are considered, and results will be compared with the original scenario. From an extensive simulation study, we will draw some conclusions
[EN] The objective of this dissertation is to analyze what happens when the hypothesis of the ANOVA and ANCOVA models fail. These hypotheses are variance homogeneity, normality and independence of the observations. With this goal on mind, we will introduce first the models and the statistic tool that we will use in the simulation study. Secondly, we will show the performance in practice. Thus, we will begin to evaluate the behaviour of the F test in terms of calibration and power in the scenarios, fulfilling totally the required hypothesis. Then, some scenarios relaxing this assumptions are considered, and results will be compared with the original scenario. From an extensive simulation study, we will draw some conclusions
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Traballo de Fin de Grao en Matemáticas. Curso 2019-2020
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