In a study of 420 comma 113 cell phone​ users, 139 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 0.001 significance level. Identify the null​ hypothesis, alternative​ hypothesis, test​ statistic, a. What is the test​ statistic? z equals ​(Round to two decimal places as​ needed.) b. What is the​ P-value?

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In a study of 420 comma 113 cell phone​ users, 139 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 0.001 significance level. Identify the null​ hypothesis, alternative​ hypothesis, test​ statistic,

 

a. What is the test​ statistic?
z equals
​(Round to two decimal places as​ needed.)
 
b. What is the​ P-value?
​P-value equals
​(Round to four decimal places as​ needed.)
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