In a study of the effects on babies of cocaine use during pregnancy, the following data on birth weights were obtained: n = 190, x with a bar above it = 2700 g, s = 645g (according to data from "Cognitive Outcomes of Preschool Children with Prenatal Cocaine Exposure ”, by Singer et al., Journal of the American Medical Association, vol. 291, no. 20). The study design justifies the assumption that the sample can be treated as a simple random sample. Use the sample data to construct an estimate of the 95% confidence interval

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