document.write( "Question 888617: In the formula Σ (x – µ) ^2/n for the variance, in what cases would we divide by n-1 instead of n? \n" ); document.write( "

Algebra.Com's Answer #537518 by Edwin McCravy(20063) $\"\"$ $\"About$

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when it's a sample. Only use n for populations.
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