## Central Limit Theorem help! (And its distribution...which variance do i use?)

Hey =]

In a typical exam question you are given....

$n=50$
$\sum x=1615.0$
$\sum x^2=52214.50$

and because of the Central Limit Theorem...

$X\sim N(\mu , \frac{\sigma ^2}{n} )$

So when you use the normal distribution...which variance should you use? The unbiased one (n/(n-1))? Or the biased one?

Thanks guys!