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st: confx command


From   "josemaria" <jmpsouza@usp.br>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: confx command
Date   Fri, 28 Nov 2003 21:06:49 -0200

Dear statalisters:

I have the data set from Caulcutt & Boddy book Statistics for Analytical
Chemists:
concentration (x): .002 .003 .005 .008 .012
absorbance (y):    .12   .14   .27   .40  .52
After doing the regression of y on x, the idea is to observe some y (.1 , .2
, .4 say) and predict X with its confidence interval.
I tried the -confx - command, but could not  identify what are the variables
depvar (y?) indepvar (x?) yobsvar (? ? ?), since I have just two variables.
Thank you for any help.
Jose Maria

Jose Maria Pacheco de Souza, Professor Titular
Departamento de Epidemiologia/Faculdade de Saude Publica, USP
Av. Dr. Arnaldo, 715
01246-904  -  S. Paulo/SP - Brasil
fones (11)3082-3886; (11)3066-7724; (11)3768-8612; (11)3714-2403
fax (11)3082-2920; (11)3714-2403
www.fsp.usp.br/~jmpsouza

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