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st: how to find the integral for a portion of a normal distribution.


From   "Buzz Burhans" <buzzb3@earthlink.net>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: how to find the integral for a portion of a normal distribution.
Date   Mon, 3 May 2010 20:57:31 -0600

My weak math skills are showing up here - 

For demonstration purposes, I have generated a set of 100,000 observations
with a normal distribution, mean 2.02, SD 1.74 and visualized this data and
the portion of observations above 1  with a histogram

drawnorm x , means(2.02) sds(1.75) n(100,000) clear
hist, xline(1)

I also computed the proportion of the observations <=1 from the Z score.

What I don't know how to do in Stata is find the integral for the
proportions of the distribution above and below 1.  

How can I determine those two integrals in Stata?

Thanks



Buzz Burhans, Ph.D. 

Dairy-Tech Group
So. Albany, VT / Twin Falls ID

Phone: 802-755-6842
Cell: 208-320-0829
Fax VT: 802-755-6842
Fax ID: 208-735-1289

Email: buzzb3@earthlink.net


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