Q. 234.6( 22 Votes )

To find out the c

Answer :

We may calculate class marks (xi) for each interval by using the relation

xi =


Class size = 0.04


Now taking 0.14 as assumed mean (A), we can calculate as follows:



Mean (x̅) = A + * h


= 0.14 + * (0.04)


= 0.14 – 0.04133


= 0.099ppm


SO, mean concentration of SO2 in the air is 0.099ppm


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