Weighted Kappas for 3×3 Tables

Table 1

Notation for a 3×3 agreement table with proportions.

		Rater 2
		1	2	3	Total
	1	𝜋11	𝜋12	𝜋13	𝜋1+
Rater 1	2	𝜋21	𝜋22	𝜋23	𝜋2+
	3	𝜋31	𝜋32	𝜋33	𝜋3+
	Total	𝜋+1	𝜋+2	𝜋+3	1