在检疫研究中,为了保证检疫工作的安全性和特殊的精确性,要求被处理的检疫害虫的存活率必须在足够低的范同内。倘若对总体中某一试验单元(比如,一个虫子,一片叶子或一棵树)的观察只能确定其是或非(比如:有虫或无虫;活或死)的话,那么反映这类现象最适宜的统计规律应当是二项分布。主观上讲对某一试验学元观察的结果只有两个可能,要么“成功”,要么“失败”。如果几个实验单元(e.u)相互独立, In quarantine research, in order to ensure the safety and special accuracy of quarantine work, the survival rate of quarantine pests requiring treatment must be within a sufficiently low range. If the observation of a test unit (such as a worm, a leaf or a tree) in the population as a whole can only be confirmed as positive or negative (eg, with or without worms; live or dead), this phenomenon is reflected The most appropriate statistical law should be binomial distribution. Subjectively, there are only two possibilities for the result of observational observation in a certain experiment, either “success” or “failure”. If several experimental units (e.u) are independent of each other,