Request for help regarding the application of the Nemerow formula in environmental impact assessments
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In a certain water body, the COD concentration was measured 4 times to be 17.3 mg/l, 18.6 mg/l, 19 mg/l, and 20.6 mg/l. Using the Nemero method, what is the statistical value of the COD concentration in mg/l??? The answer given is 25.6; I’m not sure how this figure was obtained. I hope someone knowledgeable can explain it, and those who provide a detailed calculation process will receive a generous reward! ! ! Additionally: In the investigation and assessment of the current status of surface water environments, is the measured extreme value for the Nemero formula the maximum value? ? ? The arithmetic mean is the sum of four numbers divided by 4 (for example, in the case of four numbers)? ? ?
http://bbs.hcbbs.com/viewthread. ... ge=1&extra=page%3D1 Please check here for my detailed explanation. On the 3rd floor