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AMS Subj. Classification: 62P10, 62H30, 68T01This study examines different approaches of binary classification applied to the prob-
lem of making distinction between former and current smokers. Prediction is based on data
collected in national survey performed by the National center for health statistics of America
in 2000. The process consists of two essential parts. The first one determines which attributes
are relevant to smokers status, by using methods like basic genetic algorithm and different
evaluation...
We assume that the result of a football game depends upon the difference of the strengths of the teams, home-field advantage, random factors and also other components. We describe the goal outcome per game by independent Poisson random variables; we concentrate on expected values. The least squares estimators of the parameters are obtained. The study is illustrated by examples from the Italian and Polish leagues.
This paper deals with the problem of risk measurement under mixed operation. For this purpose, we divide the basic risks into several groups based on the actual situation. First, we calculate the bounds for the subsum of every group of basic risks, then we obtain the bounds for the total sum of all the basic risks. For the dependency relationships between the basic risks in every group and all of the subsums, we give different copulas to describe them. The bounds for the aggregated risk under mixed...
Frente a la visión antigua de controlar la calidad mediante la inspección final, o la clásica del control estadístico del proceso, la forma que actualmente podríamos denominar moderna, y desde luego la más económica de asegurar la calidad, consiste en diseñar productos tales que sus prestaciones se mantengan en el nivel deseado aunque éstos no se hayan fabricado en las condiciones más adecuadas, o se hayan elaborado con materias primas que no reúnan las condiciones óptimas, o bien que sean utilizados...
This paper describes a modification of the kriging method for working with the square root transformation of a spatial random process. We have developed this method for the situation where the spatial process observed is not supposed to be stationary but the assumption is that its square root is a second order stationary spatial random process. Consequently this method is developed for estimating the integral of the process observed and finally some application of the method is given to data from...
El artículo muestra una parte de los resultados obtenidos en una aplicación del Análisis Factorial Múltiple al estudio de una tabla ternaria de contingencia. No se pretende proporcionar una interpretación exhaustiva de los resultados electorales, sino resaltar que, en este estudio, los dos tipos de inercia en que se descompone la inercia total de la tabla (Inercia INTER e inercia INTRA) son casi ortogonales, lo que facilita mucho su interpretación. Por este motivo este ejemplo puede utilizarse dentro...
High-dimensional data models abound in genomics studies, where often inadequately small sample sizes create impasses for incorporation of standard statistical tools. Conventional assumptions of linearity of regression, homoscedasticity and (multi-) normality of errors may not be tenable in many such interdisciplinary setups. In this study, Kendall's tau-type rank statistics are employed for statistical inference, avoiding most of parametric assumptions to a greater extent. The proposed procedures...
A linear geostatistical model is considered. Properties of a universal kriging are studied when the locations of observations aremeasured with errors. Alternative prediction procedures are introduced and their least squares errors are analyzed.
On propose un indice de vocabulaire partagé γ afin d'évaluer les ressemblances et les différences entre les ensembles de mots utilisés dans deux sous-groupes d'une communauté. Cet indice mesure la différence entre le nombre moyen de mots partagés par deux locuteurs, l'un dans le premier groupe, l'autre dans le deuxième et le nombre prédit par une hypothèse nulle basée sur une distribution globale de la fréquence des mots. La formulation de γ permet des variations dans la taille de l'échantillon...
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