Calculates variance based on the entire population.
Syntax
VARP(number1,number2,...)
Number1,number2, ... are 1 to 30 number arguments corresponding to a population. Logical values, such as TRUE and FALSE, and text are ignored. If logical values and text must not be ignored, use the VARPA function.
Remarks

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

The equation for VARP is:
Example
Suppose all 10 tools stamped from the same machine during a production run are collected and measured for breaking strength.
St1 
St2 
St3 
St4 
St5 
St6 
St7 
St8 
St9 
St10 
Formula 
Description (Result) 
1345 
1301 
1368 
1322 
1310 
1370 
1318 
1350 
1303 
1299 
=VARP([St1], [St2], [St3], [St4], [St5], [St6], [St7], [St8], [St9], [St10]) 
Variance of breaking strengths for all the tools, assuming that only 10 tools are produced (678.84) 