A study of 420,075 cell phone users found that 0.0331% of them developed cancer of the brain or nervous system. Prior to

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A Study Of 420 075 Cell Phone Users Found That 0 0331 Of Them Developed Cancer Of The Brain Or Nervous System Prior To 1 (22.67 KiB) Viewed 12 times

A study of 420,075 cell phone users found that 0.0331% 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 0.0333% for those not using cell phones. Complete parts (a) and (b). C 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. % <p<% (Do not round until the final answer. Then round 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 cell phones? Why or why not? O A. Yes, because 0.0333% is included in the confidence interval. O B. No, because 0.0333% is included in the confidence interval. O C. Yes, because 0.0333% is not included in the confidence interval. O D. No, because 0.0333% is not included in the confidence interval.