# Finding value of z-score.

• June 1st 2007, 09:24 AM
ThePerfectHacker
Finding value of z-score.
How do I find the corresponding value to a certain z-score? Besides using the table of value.

I was assuming that if $z>0$ then I need to compute:
$\frac{1}{ \sqrt{\pi} } \int_0^z e^{-x^2} dx$
But that does not work when I numerically integrate that.
• June 1st 2007, 09:38 AM
CaptainBlack
Quote:

Originally Posted by ThePerfectHacker
How do I find the corresponding value to a certain z-score? Besides using the table of value.

I was assuming that if $z>0$ then I need to compute:
$\frac{1}{ \sqrt{\pi} } \int_0^z e^{-x^2} dx$
But that does not work when I numerically integrate that.

$\frac{1}{ \sqrt{2 \pi} } \int_0^z e^{-x^2/2} dx$

RonL