In a study of 228,617 cell phone users, it was found that 79 developed cancer of
ID: 3390348 • Letter: I
Question
In a study of 228,617 cell phone users, it was found that 79 developed cancer of the brain or nervous system. Assuming that cell phones have no effect, there is a 0.000434 probability of a person developing cancer of the brain or nervous system. We therefore expect about 100100 cases of such cancer in a group of 228,617 people. Estimate the probability of 79 or fewer cases of such cancer in a group of 228,617 people. What do these results suggest about media reports that cell phones cause cancer of the brain or nervous system? (a)
P(x 79)=?
(Round to four decimal places as needed.)
Explanation / Answer
In a study of 228,617 cell phone users, it was found that 79 developed cancer of