Hi,
I am trying to conduct a Z test in SAS, which means compare the regression cofficients between two subsample.
model:
Y=b0+b1*x1+b2*x2...+bn*xn+error
the Z statistic goes like this
Z=(b1_sub1-b1_sub2)/sqrt(var(b1_sub1)+var(b1_sub2));
this statistic follows a chi-square distrubution, I think. (well, frankly, I am not sure on this)
If I want to get the P-value, what should I do?
BTW, this test is proposed by Clogg, C., E. Petkova, and A. Haritou. 1995. Statistical methods for comparing regression coefficients
between models. American Journal of Sociology
Take a look at: http://support.sas.com/kb/22/896.html
Plus, one can often discover how to use SAS to do most tests at: http://support.sas.com/kb/30/333.html
Take a look at: http://support.sas.com/kb/22/896.html
Plus, one can often discover how to use SAS to do most tests at: http://support.sas.com/kb/30/333.html
THX! I will have a look.
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