State four merits of Arithmetic Mean

(i) Easy to compute : The calculation of arithmetic mean is very simple and easy.
(ii) Easy to understand : It is very easy to understand. Even common man can understand it easily.
(iii) Least affected by fluctuations : It is the main feature of arithmetic mean that it is hardly affected by the changes.
(iv) Based on all the items of series : It helps in getting the proper picture of whole data.