Question

Asked Oct 25, 2019

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A study of 420097 cell phone users found that 134 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 0.0427% 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.

Step 1

The provided data is,

Step 2

Therefore, the sample proportion is,

Step 3

The level of confidence is provided as 95% or 0.95. Therefore, the level of sign...

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