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。
2
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。
3
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.