The degree of the overdispersion decreases with the increase ofthe mean density.
其聚集分布的强度随寄生虫种群平均密度的增加而降低。
In theory, an efficient and simple method for testing overdispersion is theoretically provided.
在理论上，提供了检验过方差的一个简洁而有效的方法。
The influencing factors analysis of the Numbers of hospitalization showed that the data not only existed the phenomenon of zero inflation, but also existed overdispersion problems.
居民年住院次数影响因素研究数据分析可知，住院次数不仅存在零膨胀现象，而且还存在过离散问题。
The influencing factors analysis of the Numbers of hospitalization showed that the data not only existed the phenomenon of zero inflation, but also existed overdispersion problems.
居民年住院次数影响因素研究数据分析可知，住院次数不仅存在零膨胀现象，而且还存在过离散问题。
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