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Estimación de la proporción de una subpoblación oculta a través de muestreo por “bola de nieve” estratificado
(2008)
The inference process is inefficient when employing conventional sampling tech- niques to sample from hidden populations and those of difficult access. The method of sampling by reference or “Link-Tracing” (“Snowball ...
Ciclos económicos de Puerto Rico: uso de modelos y técnicas estadísticas multivariadas
(2010-05)
Economic cycles provide the best monthly economic indicators of a country, both on the long and short term scale. For this reason it is necessary that the cycles model the economy to the most optimal degree possible. This ...
Comparación de métodos directos e indirectos para estimar prácticas de “copiarse” y plagio en el Recinto Universitario de Mayagüez
(2008)
A study is presented on the methodology of comparing different survey techniques based on indirect methods against direct methods to estimate the practice of copying and plagiarism of students at the University of Puerto ...
Rendimiento de los estudiantes del Recinto Universitario de Mayagüez en su primer curso de matemáticas : una aplicación de análisis multivariado
(2010-12)
We obtained data from 6,924 freshmen admitted to the University of Puerto Rico at Mayagüez since 2005 to 2007. For each one of these students we registered information about the following variables: Type of high school ...
The effect of the ARRA infrastructure funds to the economic cycles of the 50 U.S. states and Puerto Rico
(2011-05)
This study is dedicated to examine how the distribution and expenditure of the funds of the American Recovery and Reinvestment Act (ARRA) of 2009 destined to infrastructure projects impacted the economic cycles of the 50 ...
La transmisión de la epidemia de VIH/SIDA en Puerto Rico: Modelos de regresión.
(2009)
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 ...
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 ...
Comparación de técnicas basadas en muestreo para solucionar el problema de dos clases desbalanceadas
(2011-05)
Nowadays, estimation and evaluation of classification models has increased as an area of research in pattern recognition in data bases. One of the main problems that contribute to performance deterioration of classification ...