TABLE 3.

Counting rules for the numbers of the variables.

	Normal	AF	Other	Noisy	Total
Normal	Nn	Na	No	Np	ΣN
AF	An	Aa	Ao	Ap	ΣA
Other	On	Oa	Oo	Op	ΣO
Noisy	Pn	Pa	Po	Pp	ΣP
Total	Σn	Σa	Σo	Σp