VARP function
Calculates variance based on the entire population.
Syntax
VARP(number1,number2,...)
Number1, number2, ... are 1 to 255 number arguments corresponding to a population.
Remarks

VARP assumes that its arguments are the entire population. If your data represents a sample of the population, then compute the variance by using VAR.

Arguments can either be numbers or names, arrays, or references that contain numbers.

Logical values, and text representations of numbers that you type directly into the list of arguments are counted.

If an argument is an array or reference, only numbers in that array or reference are counted. Empty cells, logical values, text, or error values in the array or reference are ignored.

Arguments that are error values or text that cannot be translated into numbers cause errors.

If you want to include logical values and text representations of numbers in a reference as part of the calculation, use the VARPA function.

The equation for VARP is:
where x is the sample mean AVERAGE(number1,number2,…) and n is the sample size.
Example
Suppose all 10 tools stamped from the same machine during a production run are collected and measured for breaking strength.
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example

Create a blank workbook or worksheet.

Select the example in the Help topic.
Note Do not select the row or column headers.
Selecting an example from Help

Press CTRL+C.

In the worksheet, select cell A1, and press CTRL+V.

To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.

