#5. A study of420,029 cell phone users found that 137 of them developed cancer of the brain or nervous system. Prior to

[answerhappygod]

#5.
A study of420,029 cell phone users found that 137 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
0.0446​% for those not using cell phones.
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.
​%
​(Round to three decimal places as​ needed.)