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A study of 420 comma 059 cell phone users found that 130 of them developed cancer...

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A study of 420 comma 059 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 be0.0438​% 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.

2. Use the sample data and confidence level given below tocomplete parts​ (a) through​ (d). A research institute poll askedrespondents if they felt vulnerable to identity theft. In the​poll, n equals 934 and x equals 524 who said​ \"yes.\" Use a 95 %confidence level. ​b) Identify the value of the margin of errorE.

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1 A study of 420 comma 059 cell phone users found that 130 of them developed cancer of the brain or nervous system Prior to this study of cell phone use the rate of such cancer was    See Answer
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