In reply to Warren F Kuhfeld.

Yes, and furthermore, the TRANSREG procedure enables you to obtain confidence limits for the predicted mean. It provides both "liberal" and "conservative" confidence intervals. To compare the PROC TRANSREG output to the QP solution, run the following:

proc transreg data=Have plots(only)=Fit;
model identity(y) = monotone(x);
output out=monofit p CLM; /* var names are Py LMLy LMUy (liberal) and CMLy CMUy (conservative) */
run;

title "Predicted Values and Liberal CLM from PROC TRANSREG";
proc sort data=monofit;
by x;
run;

proc sgplot data=monofit noautolegend;
band x=x lower=LMLy upper=LMUy;
scatter x=x y=y;
series x=x y=py;
run;