04-29-2010, 12:44 AM
A case control study is performed to determine the association between brain tumors and cell phone use.The results show an odds ratio of 4.3( 95 % confidence interval 0.9-8.2) for an association between brain tumors and cell phone use.Assume that a 99 % confidence interval was computed rather than the 95 % confidence 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-cant be determined
a-larger
b-smaller
c-the same
d-cant be determined