Question: For 186 randomly selected babies, the average (mean) of their birth weights is 3,103 grams (based on data from Cognitive Outcomes of Preschool Children with

For 186 randomly selected babies, the average (mean) of their birth weights is 3,103 grams (based on data from "Cognitive Outcomes of Preschool Children with Prenatal Cocaine Exposure," by Singer et al., Journal of the American Medical Association, Vol. 291, No. 2 Identify the sample, the population, the sample statistics and the population parameter.
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