In a study of 228617 cell phone users it was found that 79 d

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.)

Solution