Measurements on babies of mothers who used marijuana during pregnancy were compared to measurements on babies of mothers who did not. the sample mean head circumference was larger in the group who wer

Measurements on babies of mothers who used marijuana during pregnancy were compared to measurements on babies of mothers who did not. the sample mean head circumference was larger in the group who were not exposed to marijuana and the 95% confidence interval for the difference in mean circumference between the 2 groups was .61 to 1.19 cm. what can be said about the (2-sided) p value for testing the hypothesis of equal means?