×

The geometry of statistical models for two-way contingency tables with fixed odds ratios. (English) Zbl 1112.14318

Summary: We study the geometric structure of the statistical models for two-by-two contingency tables. One or two adds ratios are fixed and the corresponding models are shown to be a portion of a ruled quadratic surface or a segment. Some pointers to the general case of two-way contingency tables are also given and an application to case-control studies is presented.

MSC:

14Q99 Computational aspects in algebraic geometry
62H17 Contingency tables

Software:

SINGULAR; CoCoA
PDFBibTeX XMLCite
Full Text: arXiv