Calculates variance based on the entire population. In addition to numbers, text and logical values such as TRUE and FALSE are included in the calculation.
Syntax
VARPA(value1,value2,...)
Value1,value2,... are 1 to 30 value arguments corresponding to a population.
Remarks

VARPA assumes that its arguments are the entire population. If your data represents a sample of the population, you must compute the variance using VARA.

Arguments that contain TRUE evaluate as 1; arguments that contain text or FALSE evaluate as 0 (zero). If the calculation must not include text or logical values, use VARP instead.

The equation for VARPA 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 
=VARPA([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) 