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Consider the following distribution of daily wages of 50 workers of a factory.
Daily wages (in Rs). | 100-120 | 120-140 | 140-160 | 160-180 | 180-200 |
Number of workers: | 12 | 14 | 8 | 6 | 10 |
Given:
Daily wages of 50 workers of a factory.
To do:
We have to find the mean daily wages of the workers of the factory.
Solution:
Let the assumed mean be $A=150$
We know that,
Mean $=A+h \times \frac{\sum{f_iu_i}}{\sum{f_i}}$
Therefore,
Mean $=150+20\times\frac{-12}{50}$
$=150-\frac{24}{5}$
$=150-4.8$
$=145.2$
The mean daily wages of the workers of the factory is $Rs.\ 145.20$.
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