Chi-Square test of independence 卡方独立性检定
chi-square test of four-fold table 四格表卡方检验
The Constructor: Backbone of the Chi Square test
构造函数：X 平方分布检验的主干
Listing 4 looks at the Chi Square constructor code which forms the backbone of the Chi Square test.
清单4给出了X平方分布的构造函数代码，它构成了X平方分布检验的主干。
Another interesting application of the one-way Chi Square test is to repoll to see if responses have changed.
单向 X 平方分布检验的另一个有趣应用是重新进行民意测验，以了解人们的回答是否已发生变化。
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