Write function of statistics in detail

Following are the functions of statistics :
I. Presentation of facts in figures :Statistics presents the various facts and figures, in such a manner so that various complicated facts become easy, brief and concrete and they may be understood easily. In it, facts are presented through diagrams and graphs, which are useful to a common man also.
2. Establishment of relationship : With the help of statistical methods (correlation), relationship between two or more facts may be established. It may be find out that these facts have any relationship or not, what is the direction and degree of relationship between them etc.
3. Comparison : Two or more effects may be compared with the help of statistics. Various averages, rates, percentages and coefficients are used for this purpose.
4. Interpretation of problems : With the help of statistical devices, interpretation of various problems may be done. For example by collecting the data of unemployment among educated persons, the nature of employment problems among them may be interpreted.
5. Formation of laws and principles of other sciences : Statistics helps to other social and natural sciences in forming the laws and with its help the various rules and principles of those sciences may be tested.
6. Helpful in deciding the policy : With the help of statistics various policy decisions may be taken logically and successfully. For example price policy, export-import policy etc.