>with three random variables X, Y, Z, it’s possible for X to contain zero information about Z, and Y to contain zero information about Z, but for the pair (X,Y) together to contain nonzero information about Z.
there’s a name for this and I can *never freakin remember it.* I need to make a mnemonic the next time I find it.
>with three random variables X, Y, Z, it’s possible for X to contain zero information about Z, and Y to contain zero information about Z, but for the pair (X,Y) together to contain nonzero information about Z.
there’s a name for this and I can *never freakin remember it.* I need to make a mnemonic the next time I find it.
*Music jingles*
If you think your x and y vary independently
And neither x nor y can explain your z
But x and y together create a neat story
then you’ve got a ________!
Pairwise independent but triple-wise dependent*?
*The phrase mutually dependent seems more common, but it’s more general.
EDIT: Easier to remember version:
Dependent triple that’s pairwise independent.