Joseph Syjuco <joseph@asti.dost.gov.ph> writes:
> i needed the variance function ... i dont know if i introduced the wrong
> parameters or maybe this variance is not the variance that im looking
> for but it doesnt provide the right results
> variance=(nEx^2 - (Ex)^2)/(n(n-1))
That's what I'd expect it to do, all right. Please define "doesnt
provide the right results".
regards, tom lane