In a study, the risk difference for the proportions of pre-term births among mothers with standard prenatal care versus those with intensive prenatal care was 1.5% (with a higher proportion of pre-term births among mothers with standard prenatal care). The 95% condence interval for the risk difference was 0.75% to 2.25%. What can we say about the pvalue for the associated two-sided test (testing the null hypothesis that the proportions of preterm birth are the same across groups)? / ' p 0.05 / \\ Not enough information to determine