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standard error reported by gnu
Posted By: rambiz
Date: Thursday, 8 December 2016, at 11:44 a.m.
In Response To: standard error reported by gnu (Tom Keith)
I am getting back to this problem because of some recent stuff, I'm involved in.
1) Should't the joint standard deviation rather be:
JSD=sqrt(SD1^2+SD2^22*COV) ?
Where COV is the covariance of the outcomes of the two plays in question.
2) Since all backgammon games end in a race, I think that the covariance is almost always a positive number? Does everybody agree?
3) Can you come up with a position, where the outcomes of two plays have a negative covariance (same dice sequence for both plays, of course)?

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