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Pollution in West Tn. is thought to be producing a variety of health problems. You have been hired to test this hypothesis. Design an experiment to study the effects of 4 pollutants in 6 counties randomly selected from all counties in West Tn. Within each county, streams were randomly selected and 1 of 4 pollutants was placed in each stream. Twenty four hours later and 3 miles downstream from the point of injection, 4 containers of water are taken out for analysis. Either summarize your design or give an appropriate layout with table.

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