16. In a study of the effect of prenatal cocaine use on infants,the following sample data were obtained for weights at birth: n =101, x 2700 grams ? , and s = 645 grams (based on data from“Cognitive Outcomes of Preschool Children with Prenatal CocaineExposure,” by Singer et al., Journal of the American MedicalAssociation, Vol. 291, No. 20). Use the sample data to construct a95% confidence interval estimate of the standard deviation of allbirth weights of infants born to mothers who use cocaine duringpregnancy. Round to the nearest whole gram.
