Find the mean of each of the following frequency distribution:

Class interval:	25-35	35-45	45-55	55-65	65-75
Frequency:	6	10	8	12	4.

To do:

We have to find the mean of the given frequency distribution.

Solution:

Let the assumed mean be $A=50$

 We know that,

Mean $=A+\frac{\sum{f_id_i}}{\sum{f_i}}$    

Therefore,  

Mean $=50+(\frac{-20}{40})$

$=50-0.5$

$=49.5$

The mean of the given frequency distribution is $49.5$.

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Updated on: 10-Oct-2022

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