Re: st: How do I graph prediction of mean growth trajectory?

[David Torres <torresd@umich.edu>]

Hello,

I actually came upon the link Nick provided in a previous post  
(http://www.ats.ucla.edu/stat/stata/faq/mar_graph/margins_graph.htm)  
while I was working on this earlier today.  The graph I was able to  
produce does seem useful in that it shows the difference in slope  
between child IQ scores of the different maternal IQ classes for both  
the control and treatment groups.  I wonder, though, if I'm missing  
something by not showing growth.  ???

Since the data include assessments at several time points (8 to be  
exact), should I not want a graph of the adjusted means at each time  
by maternal IQ and treatment group assignment?  And shouldn't it be  
curvilinear given the quadratic?  I guess I would like a growth curve  
that takes into account significant interaction effects.

--------------------------------------------

David Diego Torres, MA(Sociology)
PhD Candidate in Sociology


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