In a study of 203,802 cell phone users, it was found that 39 developed cancer of the brain or nervous system.
Assuming that cell phones have no effect, there is a 0.000235 probability of a person developing cancer of the brain
or nervous system. We therefore expect about 48 cases of such cancer in a group of 203,802 people. Estimate the
probability of 39 or fewer cases of such cancer in a group of 203,802 people. What do these results suggest about
media reports that cell phones cause cancer of the brain or nervous system?
(a) P(x≤ 39)=(Round to four decimal places as needed.)