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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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