1. Department of Statistics, Universidade de Brasília, Brasília, Brazil
2. Department of Statistics, Universidade Estadual de Campinas, Campinas, Brazil
3. Department of International Trading and Finance, Faculty of Applied Sciences, Uşak University, Uşak, Turkey
4. Department of Statistics, Faculty of Art and Sciences, Uşak University, Uşak, Turkey
5. Department of Statistics, Universidade Federal do Rio Grande do Norte, Natal, Brazil