Social Studies, 24.09.2019 02:10 jacobdesalvo8155

Agroup of concerned citizens are collecting water samples from a local river to detect the level of nitrogen in the water. they plan to take samples every day for a month and then will divide the sum by the number of days they sampled. what is the group trying to do?

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Agroup of concerned citizens are collecting water samples from a local river to detect the level of...