1. Departamento de Estatística, Universidade de Brasília, Brasilia, Brazil
2. Faculty of Applied Sciences, Department of International Trading and Finance, Uşak University, Uşak, Turkey
3. Faculty of Art and Sciences, Department of Statistics, Uşak University, Uşak, Turkey
4. Departamento de Estatística, Universidade de Brasília, Ji-Paraná-RO, Brazil