Hello,
I am having trouble finding a way to obtain the least squares line of PIC (Y) on YNG (X) separately for a dichotomous variable.
Latin America: Y= B1 +B2X
Africa: Y= B1 + B2X
This is the code I am using, but I doubt I am getting the right results:
data q2;
set work.ch12q02;
run; proc print;run;
proc glm data=q2;
class COUNTRY;
model PCI=YNG COUNTRY / solution;
lsmeans COUNTRY;
run; proc print; run;
Output:
Please help,
Thank you!
interaction, so you have separate slopes for each country:
proc glm data=q2;
class COUNTRY;
model PCI=country YNG*COUNTRY / solution;
lsmeans COUNTRY;
run;
or use a where statement to subset:
proc glm data=q2 (where=(country="XXXX"));
model PCI=YNG/ solution;
lsmeans YNG;
run;
The intercept and slope estimates will be given directly by:
/* Common error variance */
proc glm data=ch12q02;
class country;
model pci = country country*yng / noint solution;
run;
/* or, separate error variance for each country */
proc glm data=ch12q02;
by country notsorted;
model pci = yng / solution;
run;
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