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The following table gives the literacy rate (in percentage) of 35 cities. Find the mean literacy rate.
Literacy rate (in %): | 45-55 | 55-65 | 65-75 | 75-85 | 85-95 |
Number of cities: | 3 | 10 | 11 | 8 | 3 |
Given:
To literacy rate (in percentage) of 35 cities.
To do:
We have to find the mean literacy rate.
Solution:
Let the assumed mean be $A=70$.
Mean $=A+\frac{\sum{f_id_i}}{\sum{f_i}}$
Therefore,
Mean $=70+(\frac{-20}{35})$
$=70-0.57$
$=69.43$
The mean literacy rate is 69.43%.
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