Case Study Methods: It is studying the phenomenon event situation or development through a thorough and detailed analysis or intensive study. The case may be an individual a group a community, an organization a process or any unit of social life.

Statistical Method: This methods involves drawings statistical inferences and generalizations about population through mathematical values. Statistical inference is based on probability theory. A wide variety of statistical techniques is available to test sample data was drawn. Generalizations based on this methods are never statements of absolute certainty.