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st: Zcalc - with different sd in two groups


From   Lars Folkestad <lfolkestad@health.sdu.dk>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: Zcalc - with different sd in two groups
Date   Thu, 14 Jul 2011 13:46:35 +0200

Dear Stata list

I have two groups with two means and different standard deviations (SD), and the latter is the problem.
Using the zcalc program, se description below, i can calculate a z-score between the groups if the SD was the same in both groups.

How do i calculate the normal value (z-score) for a measurement method when the groups have different means?

Thank you
Lars

The zcalc option from findit:
---------------------------
Description
-----------

zcalc is a silly little program that computes z-scores.
        If you provide the arguements x mean sd, zcalc
        computes a z-score for observations.  If you
        provide the arguements mean mu sd n in the arguement
        list zclac computes a z-score for sample means.

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