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Now showing items 11-17 of 17
Comparación de los métodos de imputación con respecto al poder de separación del modelo de regresión logística
(2005)
An MCAR (Missing Completely at Random) mechanism was used with dif- ferent missing data proportions in order to generate iteratively missing values in some data sets obtained from the Machine Learning Database Repository ...
Uso de técnicas multivariadas y modelos estadísticos para el análisis del desempeño académico de los estudiantes de cálculo I-UPRM
(2007)
In this research a methodology based on multivariate analysis techniques is considered to characterize the students attending the course Calculus I (Fall semester, 2006-07) who participated in an exploratory study. This ...
La trasmisión de la epidemia de VIH/SIDA en Puerto Rico: modelos de regresión
(2009-05)
This research considered statistical modeling to forecast the number of deaths by AIDS in Puerto Rico using as predictors variables the number of diagnosed cases classified by transmission modes. For this study data was ...
Análisis sobre métodos de pruebas de hipótesis múltiple en la identificación de genes diferencialmente expresados
(2009-07)
The Human Genome Project is the most important reason for the surge of new technologies in the microarray area. These technologies facilitate the experimentation with a large number of genes simultaneously. These experiments ...
Componentes principales supervisados para clasificación de datos de expresión genética
(2005)
The gene expression data obtained through the technology of microarrays are characterized by its considerably greater amount of features in comparison to the number of observations. The direct use of traditional statistics ...
Percentile curves in binary longitudinal data
(2006)
This work presents different alternatives for modeling binary longitudinal data for continuous and categorical outcomes. Using a logistic model with random inter- cept, we propose the Percentile Curves concept, which are ...
Evaluación de métodos de imputación para datos de expresión genética
(2007)
The technology of microarrays introduced in the middle of the nineties allow the analysis of the gene expression levels of thousands of genes simultaneously. The identification of genes with an expression level very different ...