The daily income of a sample of 50 employees are tabulated as follows:

Income (in Rs):	1-200	201-400	401-600	601-800
No. of employees:	14	15	14	7

Find the mean daily income of employees.

Given:

The daily income of a sample of 50 employees.

To do:

We have to find the mean daily income of employees.

Solution:

The given data is not continuous, so subtract 0.5 from the lower limit and add 0.5 in the upper limit of each class.

Let the assumed mean be $A=300.5$.

Class size $h=200$

We know that,

Mean $=A+h \times \frac{\sum{f_iu_i}}{\sum{f_i}}$    

Therefore,  

Mean $=300.5+200\times(\frac{14}{50})$

$=300.5+4\times14$

$=300.5+56$

$=356.5$

The mean daily income of employees is Rs. 356.50.  

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Updated on: 10-Oct-2022

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