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Mathematics, 12.08.2019 21:30 yoselinruiz
Astudy of 420 comma 000 cell phone users found that 134 of them developed cancer of the brain or nervous system. prior to this study of cell phone use, the rate of such cancer was found to be 0.0438% for those not using cell phones. use the sample data to construct a 90% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system.
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