30 Apr
2005
30 Apr
'05
3:52 p.m.
Ok, you've aroused my curiosity. What means _do_ associate? "Mean": "statistical norm or average value". Mean of 2 variables would then somehow incorporate both distributions to produce a norm or average value. Maximum & minimum associate -- they are lattice operations. Presumably, an associating mean would also be a lattice op? At 11:48 AM 4/29/2005, Daniel Asimov wrote:
<< Must a Mean associate? -- Rich
Well, from ((x+y)/2 + z)/2 = x/4 + y/4/ + z/2 we see that even the arithmetic mean fails to associate.
On the other hand, I have in the past worked with mean associates (though that was not obligatory).
--Dan