Cell Phones and Brain Cancer In a study of 420,000 cell phone users in Denmark, it was found that 135 developed cancer of the brain or nervous system. Assuming that cell phones have no effect, there is a 0.000340 probability of a person developing cancer of the brain or nervous system. We therefore expect about 143 cases of such cancer in a group of 420,000 randomly selected people. Estimate the probability of 135 or fewer cases of such cancer in a group of 420,000 people. What do these results suggest about media reports that cell phones cause cancer of the brain or nervous system?