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construct a 90​% confidence interval estimate of the percentage of cell phone users

0 votes
A study of
420 comma 003420,003
cell phone users found that
131131
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
0.04480.0448%
for those not using cell phones. Complete parts (a) and (b).
a. Use the sample data to construct a
9090%
confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system.
 
nothin(Round to three decimal places as needed.)

 

asked Jan 14, 2019 in STATISTICS by anonymous

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