Well, were trying to get caught up to where we were in school last year. And we are going over standard deviation. I just have a simple question.(adsbygoogle = window.adsbygoogle || []).push({});

Why, when you are examining only a sample do you (when trying to find the variance) use n-1, and when you are examining the population, you use n?

Let's see if I can't get this in latex...:

[tex]\sqrt{\frac{1}{n-1}\sum_{i=1}^n ({x_i}-{\bar{x}})^2}[/tex]intead of [tex]\sqrt{\frac{1}{n}\sum_{i=1}^n ({x_i}-{\bar{x}})^2[/tex]

Sorry if this question insults your intelligence. I just can't see the reason.

Paden Roder

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# Just a statistics question

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