VAR
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Estimates variance based on a sample.
Syntax
VAR ( number1 ,number2, ...)
Number1,number2, ... are 1 to 30 number arguments corresponding to a sample of a population.
Remarks
VAR assumes that its arguments are a sample of the population. If your data represents the entire population, then compute the variance using VARP.
Logical values such as TRUE and FALSE and text are ignored. If logical values and text must not be ignored, use the VARA function.
VAR uses the following formula:
Example
Suppose 10 tools stamped from the same machine during a production run are collected as a random sample 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 |
=VAR([St1], [St2], [St3], [St4], [St5], [St6], [St7], [St8], [St9], [St10]) |
Variance for the breaking strength of the tools (754.2666667) |