Find the mean of each of the following frequency distribution:

Class interval:	0-10	10-20	20-30	30-40	40-50
Frequency:	9	12	15	10	14.

To do:

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

Solution:

Let the assumed mean be $A=25$

 We know that,

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

Therefore,  

Mean $=25+\frac{80}{60}$

$=25+\frac{4}{3}$

$=25+1.333$

$=26.333$

The mean of the given frequency distribution is $26.333$.

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Updated on: 10-Oct-2022

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