Note that the standard deviation is the square root of the variance, so the standard deviation is about 3.03 for a sample data set. The standard deviation for a population data set would be 2.87.

The standard deviation is a formal measure of the tendency of the numbers in your list to vary – or deviate – from the mean. You can think of it as a measure of how "spread out" your numbers are.

For example, if your mean is in cell A2, population mean in cell B2, standard deviation in cell C2, square root of degrees of freedom in E2, type the formula as =(A2-B2)/(C2/E2) to generate the T ...

Standard deviation and variance are two basic mathematical concepts that have an important place in various parts of the financial sector, from accounting to economics to investing. Both measure ...