论文部分内容阅读
水文频率计算,我国普遍采用数理统计的方法。其中,最常用的是P-Ⅲ型分布。下面就水文频率计算中的样本代表性问题提出一点意见,与大家商讨。 一、样本代表性问题 求总体的统计学前提是:样本是随机抽取、相互独立且有足够多的容量。在洪水频率计算中,样本的容量经常是很小的,而总体是无法知道的。怎样分析样本的代表性呢?由统计学原理可知,
Hydrological frequency calculation, our country generally uses the mathematical statistics method. Among them, the most commonly used is the P-Ⅲ type distribution. Here’s a bit of advice on sample representation in hydrological frequency calculations, to discuss with you. First, the representative of the sample to ask the overall statistical premise is: the sample is randomly selected, independent of each other and have enough capacity. In the calculation of flood frequency, the capacity of the sample is often very small, but generally can not be known. How to analyze the representativeness of the sample? By statistical theory,