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.
However, these symptoms are often attributed to PMS or an upcoming period, so sometimes they are not seen as pregnancy symptoms right off the bat! Three to four weeks after conception. At around three to four weeks after conception, more obvious pregnancy symptoms should start to show up. The area around a womanâs nipples should be getting darker and increasing in size. She might be experiencing some nausea (which could be morning sickness) or queasiness.