In the United States, birth weights of newborn babies are approxima itely normally distributed with a mean of mu =3,500 g and a standard deviation of sigma =500g According to the empirical rule, 68% of all newborn babies in the United States weigh between square and square

To find the range in which 68% of all newborn babies in the United States weigh, we can use the empirical rule, also known as the 68-95-99.7 rule for normal distributions.According to the empirical rule, approximately 68% of the data falls within one standard deviation of the mean. In this case, the mean is grams and the standard deviation is grams.Therefore, 68% of all newborn babies in the United States weigh between and .Calculating this, we have: grams gramsSo, 68% of all newborn babies in the United States weigh between 3,000 grams and 4,000 grams.