North Carolina births In 2004, the state of North Carolina released to the public a large data set containing information on births recorded in this state. This data set has been of interest to medical researchers who are studying the relation between habits and practices of expectant mothers and the birth of their children. This is a random sample of 1,000 cases from this data set. Variables • fage - Father's age in years. mature Maturity status of mother. • mage Mother's age in years. • • weeks - Length of pregnancy in weeks. • • • • . . • • premie - Whether the birth was classified as premature (premie) or full-term. visits - Number of hospital visits during pregnancy. - gained Weight gained by mother during pregnancy in pounds. weight Weight of the baby at birth in pounds. lowbirthweight - Whether baby was classified as low birthweight (low) or not (not low). gender Gender of the baby, female or male. habit Status of the mother as a nonsmoker or a smoker. marital Whether mother is married or not married at birth. whitemom - Whether mom is white or not white.