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Regressão binária nas abordagens clássica e bayesiana
(Universidade Federal de São Carlos, 2016-12-16)
The objective of this work is to study the binary regression model under the frequentist and Bayesian approaches using the probit, logit, log-log complement, Box-Cox transformation and skewprobit as link functions. In the ...
Inferência em modelos de mistura via algoritmo EM estocástico modificado
(Universidade Federal de São Carlos, 2017-06-02)
We present the topics and theory of Mixture Models in a context of maximum likelihood and Bayesian inferece. We approach clustering methods in both contexts, with emphasis on the stochastic EM algorithm and the Dirichlet ...
A abordagem de martingais para o estudo de ocorrência de palavras em ensaios independentes
(Universidade Federal de São Carlos, 2017-04-07)
Let {Xn} be a sequence of i.i.d. random variables taking values in an enumerable alphabet. Given a finite collection of words, we observe this sequence till the moment T at which one of these words appears as a run. In ...
Modelagens estatística para dados de sobrevivência bivariados : uma abordagem bayesiana
(Universidade Federal de São Carlos, 2017-03-31)
The frailty models are used to model the possible associations between survival times. Another alternative developed for modeling the dependence between multivariate data is the use of models based on copulas functions.
In ...
Distribuições preditiva e implícita para ativos financeiros
(Universidade Federal de São Carlos, 2017-06-01)
We present two different approaches to obtain a probability density function for the
stock?s future price: a predictive distribution, based on a Bayesian time series model, and
the implied distribution, based on Black & ...
Modelos de regressão para resposta binária na presença de dados desbalanceados
(Universidade Federal de São Carlos, 2019-02-22)
In binary regression, imbalanced data result from the presence of values equal to zero (or one) in a proportion that is significantly greater than the corresponding real values of one (or zero). In this work, we evaluate ...
Regressão binária usando ligações potência e reversa de potência
(Universidade Federal de São Carlos, 2017-04-07)
The aim of this dissertation is to study a family of asymmetric link functions for binary regression models under Bayesian approach. Specifically, we present the estimation of parameters of power and reversal power binary ...
Estudo do impacto da escolha do modelo para o controle de overdose na fase I dos ensaios clínicos
(Universidade Federal de São Carlos, 2018-10-03)
Escalation with overdose control proportional hazards is a Bayesian method with overdose control that estimates the maximum tolerated dose (MTD) assuming that the time a patient takes to show toxicity follows the proportional ...
Tempo de espera para a ocorrência de palavras em ensaios de Markov
(Universidade Federal de São Carlos, 2016-04-06)
Consider a sequence of independent coin flips where we denote the result of any landing for H, if coming up head, or T, otherwise. Create patterns with H's and T's, for example, HHHHH or HTHTH. How many times do we have ...
Estudo comparativo de métodos de estimação do modelo de resposta gradual para dados de burnout em enfermeiras
(Universidade Federal de São Carlos, 2020-04-27)
The graded response model is an Item Response Theory (IRT) model where items admit a polytomous response widely known in the literature. The motivation for this study comes from a data set which belongs to the RN4CAST ...