[1] Agami High Inst Adm Sci, Alexandria, Egypt
[2] Univ Basrah, Coll Adm & Econ, Dept Stat, Basrah, Iraq
[3] King Khalid Univ, Appl Coll, Abha, Saudi Arabia
[4] Al Azhar Univ, Fac Commerce, Dept Stat, Cairo, Egypt
[5] Al Imam Mohammad Ibn Saud Islamic Univ IMSIU, Coll Econ & Adm Sci, Dept Econ, Riyadh, Saudi Arabia
[6] Ain Shams Univ, Fac Business, Dept Math Stat & Insurance, Cairo, Egypt