Table 1 Contingency table for two partitions of n objects

u ₁

n ₁₁

n ₁₂

⋯

n _1s

n _1.

u ₂

n ₂₁

n ₂₂

⋯

n _2s

n _2.

⋮

⋮

⋮

⋮

⋮

u _r

n _{r 1}

n _{r 2}

⋯

n _rs

n _r.

Total

n _.1

n _.2

⋯

n _.s

n_.. = n