Calculate the Population Standard Deviation. 1  Calculate the mean or average of each data set. 2  Add up all the numbers in a data set and divide by the total number of pieces of data. 3  For example, if you have found numbers in a data set, divide the sum by 4.4  This is the mean of the data set.alculate the Population Standard Deviation. 1  Calculate the mean or average of each data set. 2  Add up all the numbers in a data set and divide by the total number of pieces of data. 3  For example, if you have found numbers in a data set, divide the sum by 4.
It takes about three days to four days for your milk to come in, if youâre a first-time mum. If you've had a baby before, it can happen earlier than this. Your breasts will start to feel full a couple of days after giving birth, which is a sign that your milk is coming in.
Excessively Long Feedings. During the first few day of breastfeeding, it's not uncommon for a baby to nurse for longer periods of time, or to nurse very frequently. However, by the 5th day, your milk supply should increase and your child should be able to get all the breast milk he needs within 45 minutes. If your baby is actively sucking at your breast for over 45 minutes at each feeding, it could mean that he is not getting enough milk.