Question

In a study of 412 comma 126 cell phone​ users, it was found that 162 developed cancer of the brain or nervous system. Assuming that cell phones have no​ effect, there is a 0.000474 probability of a person developing cancer of the brain or nervous system. We therefore expect about 196 cases of such cancer in a group of 412 comma 126 people. Estimate the probability of 162 or fewer cases of such cancer in a group of 412 comma 126 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 equals162​)equals nothing ​(Round to four decimal places as​ needed.) ​(b) What does the result from part​ (a) suggest about the media​ reports? The media reports appear to be incorrect because one would expect that more than 196 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. B. The media reports appear to be correct because one would expect that more than 162 cell phone users would develop cancer and the study offers significant evidence to support this. C. The media reports appear to be correct because one would expect that less than 196 cell phone users would develop cancer and the study offers significant evidence to support this.

Answer 1

The media reports appear to be incorrect because one would expect that more than 196 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.