Question: Cell Phones and Brain Cancer: When a study of 420,095 cell phones users in Denmark, it was found that 135 developed cancer of the brain or nervous systems. Estimated the probability that randomly selected cell phone user will develop such a cancer.

(a) Are the results very different from the probability of 0.000340 that was found for the general population?

(b) What does the results suggest about cell phone as a cause of such cancers, as has been claimed?