Question

In a study of 229 comma 611 cell phone​ users, it was found that 53 developed cancer of the brain or nervous system. Assuming that cell phones have no​ effect, there is a 0.000308 probability of a person developing cancer of the brain or nervous system. We therefore expect about 71 cases of such cancer in a group of 229 comma 611 people. Estimate the probability of 53 or fewer cases of such cancer in a group of 229 comma 611 people. What do these results suggest about media reports that cell phones cause cancer of the brain or nervous​ system?

​(a)

​P(xless than or equals≤5353​)equals=nothing ​(Round to four decimal places as​ needed.)

Answer 1