Two common terms used in statistics are Standard Deviation ... far the sample mean is from the main population mean. While the formula for calculating it is a little complex, Excel makes it ...

Learn the difference between the standard error of the mean and the standard deviation and how each is used in statistics and finance.

Image caption, To find the mean age, use a calculator to divide the total age of all the children (168) by how many children there are (15). 168 ÷ 15 = 11.2. The mean age is 11.2 years old.