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To find out the concentration of S O2in ...

To find out the concentration of `S O_2`in the air (in parts per million, i.e., ppm), the data was collected for 30 localities in a certain city and is presented below:Find the mean concentration of `S O_2`in the air.

Text Solution

Verified by Experts

Let us find determine Class Mark (xi) for the following class intervals by using the formula
Class Mark = (Upper class Limit + Lower Class Limit)/2
The formula to find out the mean is
Mean = `barx` = `(Sigma(fix_i) )/(Sigmafi)`
`= 2.96/30`
`= 0.099` ppm
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