What are the characteristics of statistics?

Characteristics of statistics:

             Aggregate of facts:- 

                       

                     * statistics deals with group of facts but not a single item. 

                     * A single fact relating to sales, birth, purchase, etc is not statistics.

                     * Aggregate of facts relating to sales, purchase, birth, production, over different periods is known as statistics.

            Numerically expressed:

                      * The data can be expressed in quantitative terms.

                      * Quantitative term is good, bad, poor, young, old, etc.       

                      * The term which cannot be measured numerically is not statistics.

 

            Statistics should be estimated:

                      * The data can be obtained by actual counting.

                      * If the enquiry is large data can be estimated.

             Accuracy:

                       * The data collected should be in high accuracy.

                       *  Example: Height of trees, fraction of C.M can be ignored.