Answer Happy

A study of 420018 cell phone users found that 0.0324% 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 0.0313% for those not using cellphones. Completo parts (a) and (b) a a. Use the sample data to construct a 95% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system. %% (Do not round until the final amwer. Then found to three decimal places as needed.) 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 coll phones? Why or why not? O A. No, because 0.0313% is not included in the confidence interval OB. Yes, because 0.0313% is included in the confidono interval OC. Yes, because 0.0313% is not included in the confidence interval OD. No, because 0.0313% is included in the confidence interval