Question

A study of 420,094 cell phone users found that 138 of them developed cancer. prior to this study the rate of such cancer was 0.0242% for those not using cell phones. Complete parts a and b

a) use the sample data to construct a 90% confidence interval estimate of the percentage of cell phone users who developed cancer. (round to 3 decimal)

b) Do cell phone users appear to have a rate of cancer that is different from the rate of cancer amoung thos not using cell phones?

Answer 1

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