The Journal of King Mongkut's University of Technology North Bangkok
วารสารวิชาการพระจอมเกล้าพระนครเหนือ

Kunyanat Suraruengchai
Department of Statistics, Faculty of Science, Kasetsart University, Bangkok
Thailand

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

Prasit Payakkapong
Department of Statistics, Faculty of Science, Kasetsart University, Bangkok
Thailand