In a study of 454,543 cell phone users, it was found that 114 developed cancer of the brain or nervous system. Assuming that cell phones have no effect, there is a 0.000301 probability of a person developing cancer of the brain or nervous system. We therefore expect about 137 cases of such cancer in a group of 454,543

people. Estimate the probability of 114 or fewer cases of such cancer in a group of 454,543

people. What do these results suggest about media reports that cell phones cause cancer of the brain or nervous system?

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Part 1

(a)

P(x114)=

(Round to four decimal places as needed.)

Part 2

(b) What does the result from part (a) suggest about the media reports?

A.

The media reports appear to be correct because one would expect that more than 114 cell phone users would develop cancer and the study offers significant evidence to support this.

B.

The media reports appear to be incorrect because one would expect that more than 137 cell phone users would develop cancer. In fact, the study may offer significant evidence to suggest that cell phone use decreases the probability of developing cancer.

C. The media reports appear to be correct because one would expect that less than

137 cell phone users would develop cancer and the study offers significant evidence to support this.