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Intuitive explanation for dividing by $n-1$ when calculating standard deviation?

Tal Galili · 2010
Stack Exchange · Datasets · License: CC BY-SA · 2010
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intuitionteaching
I was asked today in class why you divide the sum of square error by $n-1$ instead of with $n$, when calculating the standard deviation. I said I am not going to answer it in class (since I didn't wanna go into unbiased estimators), but later I wondered - is there an intuitive explanation for this?!
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