Find the mean of daily wages of 60 workers in a factory as per data given below:


Daily wages (in Rs)



90



110



120



130



150



No. of workers



12



14



13



11



10


Let’s draw the table and calculate the total frequency.


To calculate mean we need the relative value of variables which is xi×fi. To attain xi×fi .we have to multiply the value of variables (xi)to the frequency of the value (f1).


Daily wages (in Rs) (xi)



No. of workers (fi)



(xi×fi)



90



12



1080



110



14



1540



120



13



1560



130



11



1430



150



10



1500




∑fi = 60



∑xi×fi = 7110



By putting the formula of;


Mean =



= 118.50


1