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
where x is the sample mean AVERAGE(number1,number2,…) and n is the sample size.
Example
Suppose 10 tools stamped from the same machine during a production run are collected as a random sample and measured for breaking strength.
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