Mathematics, 20.09.2020 02:01 micahatwood03

Is the study experimental or observational? A sample of fish is taken from a lake and each fish is weighed to measure the effect of pollution from a nearby factory on the fish. This group is then compared to another group taken from a lake in the same county in a state park where no businesses or houses are near the lake.

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Is the study experimental or observational? A sample of fish is taken from a lake and each fish is w...