{"id":74868,"date":"2018-03-09T23:19:56","date_gmt":"2018-03-09T23:19:56","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/contribuciones-a-la-deteccion-de-variables-relevantes-en-tablas-de-contigencia-multivariantes\/"},"modified":"2018-03-09T23:19:56","modified_gmt":"2018-03-09T23:19:56","slug":"contribuciones-a-la-deteccion-de-variables-relevantes-en-tablas-de-contigencia-multivariantes","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/matematicas\/contribuciones-a-la-deteccion-de-variables-relevantes-en-tablas-de-contigencia-multivariantes\/","title":{"rendered":"Contribuciones a la deteccion de variables relevantes en tablas de contigencia multivariantes."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Claudio Rafael Castro Lopez <\/strong><\/h2>\n<p>En el contexto de la familia de m\u00e9todos de segmentaci\u00f3n  aid (automatic interaction detection), el m\u00e1s conocido de ellos es chaid (chi-square aid). chaid utiliza un conjunto de variables explicativas y una variable predictora, todas ellas categ\u00f3ricas. El objetivo del m\u00e9todo es segmentar la poblaci\u00f3n o muestra en grupos de individuos lo m\u00e1s homog\u00e9neos posible, respecto de la variable respuesta.  en diferentes etapas del m\u00e9todo se utiliza el test chi-cuadrado, por ejemplo, en la fase de agrupamiento de categor\u00edas de cada variable predictora y en la elecci\u00f3n del mejor predictor con respecto de la variable dependiente (primeras dos etapas del algoritmo). Emplear el test chi-cuadrado presenta ser\u00edas limitantes a un procedimiento que se supone asim\u00e9trico en su planteamiento. es decir, usar el test chi-cuadrado no captura el car\u00e1cter asim\u00e9trico de una variable respuesta y una predictora en la tabla de contingencia, no considera que la variable respuesta pueda estar en escala ordinal, no verifica condiciones de colapsabilidad de variables en la tabla multidimensional de partida, no es sensible a detectar el fen\u00f3meno conocido como paradoja de simpson, y efect\u00faa un gran n\u00famero de pruebas de hip\u00f3tesis pudi\u00e9ndose presentar riesgo en error de tipo i..  ante esta problem\u00e1tica, el trabajo de tesis desarrolla una adecuaci\u00f3n algor\u00edtmica a la fase de colapsamiento de categor\u00edas, mediante el empleo de un modelo de efectos columna, para capturar el orden subyacente en las categor\u00edas de la variable respuesta.  se profundiza en el colapsamiento de variables mediante modelos gr\u00e1ficos para tablas de contingencia multivariantes con estructuras de respuesta y modelos en bloques encadenados, ya que estos modelos son subyacentes a un proceso de segmentaci\u00f3n.  se desarrolla un m\u00e9todo de segmentaci\u00f3n basado en la obtenci\u00f3n de una variable latente (no observable), la cual es obtenida a trav\u00e9s de un modelo de clases latentes, a partir<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Contribuciones a la deteccion de variables relevantes en tablas de contigencia multivariantes.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Contribuciones a la deteccion de variables relevantes en tablas de contigencia multivariantes. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Claudio Rafael Castro Lopez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Salamanca<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 22\/06\/2005<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Purificacion Galindo Villardon<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: pedro Jimenez guerra <\/li>\n<li> Ojeda ramirez mario Miguel (vocal)<\/li>\n<li> Martin vallejo Francisco Javier (vocal)<\/li>\n<li> Garcia felipe Ana isabel (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Claudio Rafael Castro Lopez En el contexto de la familia de m\u00e9todos de segmentaci\u00f3n aid (automatic interaction [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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