turt oif nobd By a süilable method.d out the concentration of SO, in the air (in parts per million, i.e., ppm), tollected for 30 localities in a certain city and is presented below:Concentration of SO, (in ppm)0.00 0.040.04 - 0.080.08 0.120.12 0.160.16- 0.200.20 0.24Frequency424Find the mean concentration of SO, in the air.

turt oif nobd By a süilable method.d out the concentration of SO, in

1.	turt oif nobd By a süilable method.d out the concentration of SO, in the air (in parts per million, i.e., ppm), tollected for 30 localities in a certain city and is presented below:Concentration of SO, (in ppm)0.00 0.040.04 - 0.080.08 0.120.12 0.160.16- 0.200.20 0.24Frequency424Find the mean concentration of SO, in the air.
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