topic Re: PROC MIXED - Ratio SD and 95%CI in SAS Procedures

PROC MIXED - Ratio SD and 95%CI

TylerN — Sat, 24 Aug 2024 23:45:03 GMT

Hi Everyone,

I have a model as

Y~ A + B +E

where A,B are random with different level of F and E is error .

I want to obtain the ration for two within-B standard deviations for two levels of F and 95% CI.

So far I used proc mixed as below code but I don't know how to get the ratio and CI.

Proc mixed data=mydata method=reml:

model Y=;

ods output covparms=cova;

by F;

random A, B;

What option should I put there to get ratio within-B SD_{F1}/SD_{F2} and it CI? Is there any other way?

I appreciate any help.

Re: PROC MIXED - Ratio SD and 95%CI

ChrisNZ — Sat, 24 Aug 2024 23:46:13 GMT

Title edited and message moved to Procedures community.

Re: PROC MIXED - Ratio SD and 95%CI

FreelanceReinh — Sun, 25 Aug 2024 07:59:45 GMT

Hi @ChrisNZ,

I think the Statistical Procedures board would be most appropriate for questions like this. The subtitle of the SAS Procedures forum is "Help using Base SAS procedures", while SAS/STAT procedure MIXED is not part of Base SAS.

Re: PROC MIXED - Ratio SD and 95%CI

ChrisNZ — Sun, 25 Aug 2024 09:01:07 GMT

Ah yes you're right of course. I'll pay more attention from now on.