Question

The daily wages (in Rs) of 15 workers in a factory are given below:
200, 180, 150, 150, 130, 180, 180, 200, 150, 130, 180, 180, 200, 150, 180
Prepare the frequency table and find the mean wage.

Answer 1

The frequency table for the given data is as follows:
Wages ( x_i ) : 130 150 180 200
Number of workers ( fi ): 2 4 6 3

In order to compute the mean wage, we prepare the following table:

Mean wages of the workers

xi	fi	fi xi
130	2	260
150	4	600
180	6	1080
200	3	600
Total	$\sum _{}^{}{f}_i=N=15$	$\sum _{}^{}{f}_i{x}_i=$ 2540

Mean $=\frac{\sum _{}^{}{f}_i{x}_i}{\sum _{}^{}{f}_i}=\frac{2540}{15}=\mathrm{Rs}.169.33$.