Write the important functions of statistics.

Following are the important functions of statistics :

1. Presentation of facts : Statistics expresses the facts in number and in precise and definite form. It helps to understand them easily.

2. Simplification of facts : Statistics helps in simplifying the complex data into a few significant figures so as to make them understandable.

3. Comparison : Statistics makes the comparison of related facts possible. It facilitates in drawing conclusions.

4. Correlation : Statistics helps in correlating the data by establishing cause and effect relationship.

5. Forecasting : Statistics helps in forecasting future behaviour of a phenomenon. It facilitates in formulating policy and programmes.