Serpil Gumustekin
Department of Statistics, Faculty of Arts and Science, Ondokuzmayis University, Samsun, Turkey
Talat Senel
Department of Statistics, Faculty of Arts and Science, Ondokuzmayis University, Samsun, Turkey
Mehmet Ali Cengiz
Department of Statistics, Faculty of Arts and Science, Ondokuzmayis University, Samsun, Turkey