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Biology, 24.04.2020 17:25 shartiarahoward

Lake managers want to decrease possible sources of E. coli contamination at beaches on their lake. They construct retaining pools to prevent runoff of cow waste from the dairy farms around the western half of the lake. They then examined E. coli counts at the on the east side beaches and the west side beaches. They found west-side beaches had significantly fewer closures due to E. coli levels than east side beaches. The strength of this study design is that:

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