Azad A. Shareef
(1),
Sherzad M. Ajeel
(2),
Hussein A. Hashem
(3)
(1)
Dept. of Statistics, College of Administration and Economics, University of Duhok, Kurdistan Region, Iraq , Iraq,
(2)
Dept. of Mathematics, College of Science, University of Duhok, Kurdistan Region, Iraq , Iraq,
(3)
Dept. of Mathematics, College of Science, University of Duhok, Kurdistan Region, Iraq , Iraq
