Finding value of z-score.

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June 1st 2007, 10:24 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, 10:38 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

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