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A study of 420,047 cell phone users found that 130 of them developed cancer of the...

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Statistics

A study of 420,047 cell phone users found that 130 of themdeveloped cancer of the brain or nervous system. Prior to thisstudy of cell phone​ use, the rate of such cancer was found to be0.0223​% for those not using cell phones. Complete parts​ (a) and​(b). a. Use the sample data to construct a 90​% confidence intervalestimate of the percentage of cell phone users who develop cancerof the brain or nervous system.

b. Do cell phone users appear to have a rate of cancer of thebrain or nervous system that is different from the rate of suchcancer among those not using cell​ phones? Why or why​ not?

A. No, because 0.0223​% is not included in the confidenceinterval.

B.No​, because 0.0223% is included in the confidenceinterval.

C. Yes, because 0.0223% is included in the confidenceinterval.

D. Yes, because 0.0223​% is not is not included in theconfidence interval.

Answer & Explanation Solved by verified expert
3.7 Ratings (480 Votes)
Solution a The 90 confidence interval for population percentage isgiven as follows Where p is sample percentage q 100 p n is sample sizeand Z0102 is critical zvalue to construct    See Answer
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