1.

out the concentratiorToindtected for 30 localities in a certain city and is presented below:SO, in the air in parts per million, i.e., PPppm), the dataConcentration of SO, (ün ppm)0.00 0.040.04-0.080.08 0.120.12 0.160.16 0.200.20 0.24Frequency4Find the mean concentration of SO, in the air.

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