Also, I needed to have inverse probability functions.
此外，我还需要反概率函数。
The PHP-based probability functions were based upon code found on John's probability functions page.
基于PHP的概率函数是以在John的概率函数页面所找到的代码为基础的。
I was not entirely happy with this solution, so I began exploring the issue of what it would take to develop PHP-based probability functions.
我对这个解决方案并非完全满意，因此我开始研究这个问题：开发基于PHP的概率函数需要些什么。
As you study these Chi Square graphs, note that the shape of the probability functions change when you vary the degrees of freedom, or df, in your experiment.
当您研究这些X平方分布图时，请注意，当您在实验中改变自由度(即df)时，概率函数的形状会改变。
As you study these Chi Square graphs, note that the shape of the probability functions change when you vary the degrees of freedom, or df, in your experiment.
当您研究这些X平方分布图时，请注意，当您在实验中改变自由度(即df)时，概率函数的形状会改变。
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