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.
While others can't yet detect your pregnancy, by 5 weeks pregnant you may start feeling pregnant. If you have given birth previously you might notice your abdomen looks slightly larger than usual. This is largely the result of bloating. The uterus doesn't rise out of the pelvis until roughly 14 weeks pregnant but many women start experiencing bloating during early pregnancy. You may find your belly looks more poofy at the end of the day than early in the morning. Some women mistake this early pregnancy sign as a premenstrual sign.