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Satisfactory Sample

A biologist has mixed a spray designed to kill 70 percent of a certain type of insect. If a spraying of 200 such insects killed 130 of them, would you conclude that this mixture was satisfactory?

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A biologist has mixed a spray designed to kill 70 percent of a certain type of insect. If a spraying of 200 such insects killed 130 of them, would you conclude that this mixture was satisfactory?

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