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

Chayada Kaewchaicharoenkit
Department of Statistics, Faculty of Science, Kasetsart University, Bangkok
Thailand

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

Wandee Wanishsakpong
Department of Statistics, Faculty of Science, Kasetsart University, Bangkok
Thailand