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Now showing items 41-50 of 156
Estimação de funções do redshift de galáxias com base em dados fotométricos
(Universidade Federal de São Carlos, 2017-09-18)
In a substantial amount of astronomy problems, we are interested in estimating values assumed of some unknown quantity z ∈ R, for many function g, based on covariates x ∈ R^d. This is made using a sample (X1,Z1), ... ...
Mapas da transmutação : modelagem, propriedades estruturais, estimação e aplicações
(Universidade Federal de São Carlos, 2016-12-05)
Initially, we use the quadratic transmutation maps to compose a new probability
model: the transmuted log-logistic distribution. Transmutation maps are
a convenient way of constructing new distributions, in particular ...
Métodos de categorização de variáveis preditoras em modelos de regressão para variáveis binárias
(Universidade Federal de São Carlos, 2017-06-13)
Regression models for binary response variables are very common in several areas of knowledge.
The most used model in these situations is the logistic regression model, which assumes that the
logit of the probability of ...
Diagnóstico e seleção de modelos com resposta binária e função de ligação assimétrica
(Universidade Federal de São Carlos, 2023-12-06)
For binary response variables, probit and logit link functions are widely used. However, when the data is imbalanced, traditional approaches may not be suitable. In this thesis, we consider the skew-probit link function ...
Bayesian spatial process models for activation patterns in transcranial magnetic stimulation mapping
(Universidade Federal de São Carlos, 2023-07-07)
In recent years, Spatial statistical models have been gaining rapid attention for solving problems in biological systems due to the improvement in spatial data collection. It has proven extremely important in unveiling ...
Bayesian variable selection for logistic mixture models with Pólya-Gamma data augmentation
(Universidade Federal de São Carlos, 2022-02-15)
In this work, Bayesian methods for estimating and selecting variables in a mixture of logistic regressions model are presented.
In order to simplify its Bayesian estimation, we extend the data augmentation approach ...
Influência local com procura "forward' em modelos de regressão linear
(Universidade Federal de São Carlos, 2015-02-25)
The identification of influential and/or atypical observations in a data set is known as a part of the diagnostic analysis. One of the purposes of the diagnostic analysis is to verify the robustness of a statistical model, ...
Um estudo de estresse através dos níveis de cortisol em crianças
(Universidade Federal de São Carlos, 2017-05-26)
The level of cortisol is considered as a measure of people’s stress. We perform an
statistical analysis of the data from a study conducted to evaluate if children that
work on the streets during the day have higher stress ...
Modelos COM-Poisson correlacionados
(Universidade Federal de São Carlos, 2019-04-23)
In this thesis two discrete distributions are proposed: Correlated COM-Poisson (CPC) and
Generalized partially correlated COM-Poisson (CPGPC). We have also proposed regression
models for the Generalized partially correlated ...
Distribuições k-modificadas da família Série de Potência uniparamétrica
(Universidade Federal de São Carlos, 2017-05-23)
This paper proposes a family of distributions Power Series k-Modified from to model sets of count data which have or not any discrepancy in the frequency of observation k in relation to the distribution associated Power ...