1. 一般的二维列联表 B 1 B_1 B1 B 2 B_2 B2 ⋯ \cdots ⋯ B s B_s Bs 合计 A 1 A_1 A1 n 11 n_{11} n11 n 12 n_{12} n12 ⋯ \cdots ⋯ n 1 s n_{1s} n1s n 1 ⋅ n_{1\cdot} n1⋅ A 2 A_2……
