statistical methods for management. There are many reasons for this. Research in the social (especially in management) has taken on a more quantitative orientation. Like research in other sciences , it is becoming more strongly and clearly oriented toward analyzing empirical data. Nowadays, the computer revolution (statistical sofrtware) has made a greater variety of information easily available to researchers as well as to students and general public. Computers have also made statistical methods themselves easier to use. Not just easier, it is also make statistics looks more simple to applied rather than the theory with some complicated equation.