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st: confidence interval bands of linear predictions


From   Giovanni Abbiati <g.abbiati@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: confidence interval bands of linear predictions
Date   Mon, 24 Jan 2011 16:05:15 +0100

Dear listers,
I would like to graph a linear prediction with confidence interval
after controlling for a set of variables.
In particular I would like to see the differences between the "effect"
of discrete cathegories of a particular X, plotted on a continuous X.
For instance (trivial example), I would like to show how the effect
class differences (let's suppose 0=high, 1=medium, 2=low) on job
satisfaction (continuous) varies with age, in graphic terms, after
controlling for a set of variables.
How can I compute the 3 class lines at the net of the other variables,
and their confidence interval? And then, how can I plot it with age?
Thank you in advance
Giovanni
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