Natchaya Ratasukharom
Department of Statistics, Faculty of Science, Kasetsart University, Bangkok
Thailand

Boonorm Chomtee
Department of Statistics, Faculty of Science, Kasetsart University, Bangkok
Thailand

Chantha Wongoutong
Department of Statistics, Faculty of Science, Kasetsart University, Bangkok
Thailand

Sudarat Nidsunkid
Department of Statistics, Faculty of Science, Kasetsart University, Bangkok
Thailand