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In a randomized controlled trial, insecticide-treated bed nets were tested as a way to reduce headaches...

In a randomized controlled trial, insecticide-treated bed nets were tested as a way to reduce headaches Among 343 children who used the bed nets, 15 developed headaches. Among 294 infants not using bed nets, 27 developed headaches. Use a 0.01 significance level to test the claim that the incidence of headaches is lower for children who use the bed nets. Do the bed nets appear to be effective?

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