- #1

- 341

- 0

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