05-31-2009, 12:28 PM
16. a case control study is performed to determine the association between brain tumors and cell phoe use. the results show an odds ratio of 4.3 (95% cofidence interval. 0.9-8.2) for an soociation between brai tumors and cell phone use. assume that a (99% confidence interval was computed rather thatn the 95% cofidence interval. which of the following statements best describes the size of the 99% confidence interval compared to the 95% confidence interval..
a. larger
b. smaller
c. the same
d. cannot be determined from the information given.
a. larger
b. smaller
c. the same
d. cannot be determined from the information given.