On Fri, 11 Jan 2002, Dennis Roberts wrote:

> if the polls used similar ns in the samples ... i disagree
> 
> now, if the white sample was say 600 and the black sample was 100 ... i 
> MIGHT be more likely to agree with the comment below

consider white goes 10% to 15%     up 50%, 5%pts
         black goes 66.7% to 100%  up 50%, 33.3%pts

These are proportionate but hardly equivalent
----------------
   white goes 0 to 50%     up infinite %, 50%pts
   black goes 50% to 100%  up 100%        50pts
same %pts but black is more striking
I can't see any kind of equivalence in either case



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