Write four objectives of statistical average

There are following four objectives of statistical average:
(i) To present a brief picture of data : The main purpose of average is to present a simple and systematic description of the data.
(ii) To represent the universe : It also helps to obtain a picture of a complete group.
(iii) Basis of statistical analysis : It is the basis of statistical analysis as it analyse the data.
(iv) To facilitate comparison : It helps in comparing the data of various categories.