A study of XXXXXXXXXXcell 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...


A study of 420063 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 0.0434 for those not using cell phones. Complete parts​ (a) and​ (b).


a. 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. _​%
b. Do cell phone users appear to have a rate of cancer of the brain or nervous system that is different from the rate of such cancer among those not using cell​ phones? Why or why​ not?




Jun 01, 2022
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