Assuming you have SAS 9.2, you can do this using the Graph Template Language. The program below will draw a boxplot without the end caps. I used the ODS OUTPUT statement to generate an output dataset so you can verify the numbers. Let me know if you have any questions.
Thanks!
Dan
proc template;
define statgraph boxplot;
begingraph;
layout overlay;
boxplot x=age y=height / display=(fill mean median outliers);
endlayout;
endgraph;
end;
run;
ods output sgrender=boxdata;
proc sgrender data=sashelp.class template=boxplot; run;
proc print data=box; run;
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