结合在教学、科研以及指导研究生论文过程中遇到的有关 2 检验应注意的问题进行深入的分析与探讨。通过对一致性检验与独立性检验的区别 ,分类的不同对 2 的影响 ,样本含量对 2 值的影响 ,修正 2 的使用 , 2 值接近 0的处理以及 2 检验对定序、定距等较高计时水准进行分析的缺陷的讨论和再认识 ,以提高正确使用 2 检验的准确性。 Combined with teaching, research and guiding graduate thesis encountered in the process of 2 tests should pay attention to in-depth analysis and discussion. Through the consistency test and the independent test of the difference between the different classification of 2, the sample size on the value of 2, the use of a correction of 2 close to 0 value of 2 processing and sequencing, distance, etc. High-level analysis of the timing of the defects discussed and re-understanding, to improve the correct use of 2 test accuracy.