Tail Probabilities for Contingency Tables with Small Expectations
小期望频数列联表的尾部概率
In most cases where an application of the χ2 test for contingency tables is recommended, only the size of the expected values is taken into account and not the level of significance. In the present article, a method is proposed which is mainly suitable for those cases for which the applicability of the χ2 test is doubtful, whereas the exact test would require too much computational work.