In a study of 420,132 cell phone users, 149 subjects developed cancer of the brain or nervous system. Test the claim of a somewhat common belief that such cancers are affected by cell phone use. That is, test the claim that cell phone users develop cancer of the brain or nervous system at a rate that is different from the rate of 0.0340% for people who do not use cell phones. Because this issue has such great importance, use a 0.005 significance level. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value method and the normal distribution as an approximation to the binomial distribution.

QUESTIONS:

1. What is the test statistic?

z= _________ (Round to two decimal places needed.)

2. What is the P-value?

P-value= ______________ (Round to four decimal places as needed.)

3. What is the conclusion on the null hypothesis?