non-central chi-square distribution

例句：

1. 1. The non-central chi-square distribution is used to test the goodness of fit of a model.
   非中心卡方分布用于检验模型的拟合优度。
2. 2.In this study, we used the non-central chi-square distribution to analyze the relationship between variables.
   在这项研究中，我们使用非中心卡方分布来分析变量之间的关系。
3. 3. The non-central chi-square distribution is widely used in statistical analysis because it provides a more accurate measure of fit than the normal chi-square distribution.
   非中心卡方分布由于其比正态卡方分布更准确地衡量拟合度，而在统计分析中被广泛使用。