Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Association and Simpson conversion in $2 \times 2 \times 2$ contingency
  tables   We study a generalisation of Simpson reversal (also known as Simpson's
paradox or the Yule-Simpson effect) to $2 \times 2 \times 2$ contingency tables
and characterise the cases for which it can and cannot occur with two
combinatorial-geometric lemmas. We also present a conjecture based on some
computational experiments on the expected likelihood of such events.

7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat