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English, 05.05.2020 22:17 martinezlittleman

A pool store owner wants to determine the effect of algaecide brands on the treatment of pool water with algae. He adds a different brand of algaecide to each of three pools with similar algae levels. He measures the algae level in each pool after treatment.
Randomized or Obervational?

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A pool store owner wants to determine the effect of algaecide brands on the treatment of pool water...

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