1. Department of Statistics; Universidade Federal do Amazonas; Amazonas Brazil
2. School of Industrial Engineering; Pontificia Universidad Católica de Valparaíso; Valparaíso Chile
3. Department of Statistics; Universidade de Brasília; Distrito Federal Brazil
4. Faculty of Administration, Accounting and Economics; Universidade Federal de Goiás; Goiás Brazil
5. Department of Statistics; Universidade Federal de São Carlos; São Paulo Brazil