In: Statistics and Probability
In a study of 420,009 cell phone users found that 139 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
0.0439% for those not using cell phones. Complete parts (a) and
(b).
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.
% < p < %
(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?
A.
Yes, because 0.0439% is included in the confidence
interval.
B.No,because 0.0439% is included in the confidence interval.
C.Yes because 0.0439% is not included in the confidence
interval.
D.No because 0.0439% is not included in the confidence interval.