Mathematics, 25.11.2021 07:20, boxergirl9875

A study of 420,065 cell phone users found that 131 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 % for those not using cell phones. Complete parts (a) and (b).

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A study of 420,065 cell phone users found that 131 of them developed cancer of the brain or nervous...