A 90% confidence interval for the mean weight of newborn babies was found to be from 6.5 to 8.5 pounds. Select the best interpretation for this confidence interval. We are 90% confident that the mean weight of newborn babies in this sample is between 6.5 to 8.5 pounds. We are 90% confident that the mean weight of all newborn babies is between 6.5 and 8.5 pounds. We are confident that the mean weight of 90% of all newborn babies is between 6.5 and 8.5 pounds. We are 90% confident that the mean weight of all possible samples of newborn babies is between 6.5 and 8.5 pounds.