Excel Function : STDEVP
Calculates standard deviation based on the entire population
Microsoft Excel Reference Page
Syntax and Description of the STDEVP Excel Function
STDEVP(number1,number2,...) The STDEVP function syntax has the following arguments: Number1, number2,... Required. One or more numbers for which you want the standard deviation.
About STDEVP Excel Function
STDEVP: Calculates standard deviation based on a sample. This function has one argument: number1: The first number in the sample.