Johnson W D, May W L
Louisiana State University Medical Center, Department of Biometry and Genetics, New Orleans 70114, USA.
Stat Med. 1995 Sep 15;14(17):1901-11. doi: 10.1002/sim.4780141706.
When one cell or more of a contingency table is necessarily zero, the table is said to contain structural zeros. These structural voids may be inherent to the problem at hand, or, in some applications, they may be introduced intentionally through the experimental design. With data classified by a third stratification variable, one needs a method for analysing a set of independent 2 x 2 tables. We propose Cochran-Mantel-Haenszel type analyses that combine observations across strata. We also propose tests of hypotheses pertaining to the marginal and conditional probabilities.
当列联表中的一个或多个单元格必然为零时，该表被称为包含结构零。这些结构空白可能是手头问题所固有的，或者在某些应用中，它们可能是通过实验设计有意引入的。对于按第三个分层变量分类的数据，需要一种方法来分析一组独立的2×2表。我们提出了结合各层观测值的 Cochr an - Mantel - Haenszel 型分析方法。我们还提出了关于边际概率和条件概率的假设检验。
