Calculate the Sample Standard Deviation. 1  Calculate the mean or average of each data set. 2  To do this, 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.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.
Most pregnant women begin to show during the second trimester. You likely gained less than 5 pounds during your first trimester, but now the number on the scale is edging relentlessly upward. As your second trimester proceeds, you'll gain an average of 1 to 2 pounds per week.
Some women begin to experience pregnancy symptoms as soon as they conceive while the others take few weeks to develop pregnancy symptoms. Experts are of view that pregnancy symptoms begin in 5th to 6th week of fertilisation. Even though some women say that they noticed changes in their body within a week of unprotected sex. Others miss the signs for a 3 or 4 weeks. When the egg is fertilised, it becomes attached to the uterus and starts to produce hCG.