The word statistics conveys many meanings to people. to some it is another form of mathematics and for some other it suggests charts, graphs and tables which they find in newspapers and many other such things.

The study of statistics involves methods of refining numerical and non-numerical information into useful forms. In addition to meaning data, statitics also refers to a subject just as mathematics or physics. In this sense statistics is a body ofmethods of obtainining and analysing in order to make decisions on them.