4 papers
Log-symmetric models with cure fraction with application to leprosy reactions data
Joyce B. Rocha, Francisco M. C. Medeiros, Dione M. Valença
In this paper, we propose a log-symmetric survival model with cure fraction, considering that the distributions of lifetimes for susceptible individuals belong to the log-symmetric…
Improved estimators in beta prime regression models
Francisco M. C. Medeiros, Mariana C. Araújo, Marcelo Bourguignon
In this paper, we consider the beta prime regression model recently proposed by \cite{bour18}, which is tailored to situations where the response is continuous and restricted to th…
Higher-order approximate confidence intervals
Eliane C. Pinheiro, Silvia L. P. Ferrari, Francisco M. C. Medeiros
Standard confidence intervals employed in applied statistical analysis are usually based on asymptotic approximations. Such approximations can be considerably inaccurate in small a…
Small-sample testing inference in symmetric and log-symmetric linear regression models
Francisco M. C. Medeiros, Silvia L. P. Ferrari
This paper deals with the issue of testing hypothesis in symmetric and log-symmetric linear regression models in small and moderate-sized samples. We focus on four tests, namely th…