the example "simple linear regression" on page 3480 in sas documentation. estimate of sigma2 in proc mcmc is 136.8,but my estimate of sigma2 is 112.7 in proc model using maximum likelihodd method . what's the problem.thanks for answering. the code of proc model: PROC model data=sasuser.class; dependent weight; parm a b sig2; weight=a+b*height; errormodel weight~normal(sig2); fit weight/method=marquardt; run;
... View more