A t test springs to mind, provided that its assumptions
are reasonably satisfied. 
Plotting a graph springs even more to mind. 
Nick 
[email protected] 
�scar Becerra-CERAC
 
> Thanks, and can anyone suggests to me a procedure to perform 
> this test?
Richard Goldstein
> porder is taking all possible pairs (control=yes paired with 
> each control=
> no) and asking in what percent of those pairs is No larger 
> than YES; this
> does not appear to be the question you are asking; if I 
> correctly understand
> your question, I think you want a parametric procedure rather than the
> rank-sum test
> 
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