simple random sampling

In a simple random sampling, the sample mean is an unbiased estimate of the population mean.

在简单随机抽样中, 样本均值是总体均值的无偏估计.

My Opinion about the Theory of Simple Random Sampling

单纯随机抽样理论之我见

Determination of optimum plot size in the simple random sampling of insect population

昆虫种群简单随机抽样最适样方大小的确定

srswor simple random sampling without replacement

简单随机不放回抽样

methods the simple random sampling rule survey was carried out, in a sample population of1238(a sampling fraction of1. 2%).

方法采用单纯随机抽样原则，以1.2%的抽样率抽取1238例作为调查对象。

DESIGN: A simple random sampling survey.

设计：简单随机抽样调查。

The generalization of post stratification from the simple random sampling to complex design is discussed.

此外,我们探讨复杂抽样下,该估计值的推广.

the paper discusses the ratio estimation with systematic pps sampling and simulates the model with the data of the first agricultural census in china on the base of introduction of the ratio estimation with simple random sampling.

本文在介绍简单随机抽样比估计的基础上，对PPS抽样设计的比估计进行了系统的研究，并使用了第一次农业普查数据对方法进行了模拟。

The households with water storage in 5 townships selected by simple random sampling in each county have been visited for household survey. 2.

在选择的调查县中，采用单纯随机法抽取5个乡镇中具有家庭储水的农户进行入户调查。

Quality Assessment for Attribute Data in GIS Based on Simple Random Sampling

基于一般抽样原理的GIS属性数据质量评定方法

under simple random sampling scheme without replacement and unknown proportion of population possessing neutral attribute, the optimal allocation of sizes of two sub-samples is given.

对简单随机不放回抽样，在总体非敏感属性个体比例未知的情况下，给出了两个子样本容量的最优配置。

Two kinds of estimators were compared under PPS sampling and simple random sampling with replacement.

本文在PPS抽样方案和有效回简单随机抽样方案的情形下构造了这两种估计并精确比较了它们的优劣.

simple random sampling with replacement

简单随机重复抽样，单纯随机放回抽样

Firstly, the Gauss map of points on the cylinder and a random sampling method are used to compute the rotation axis equation of the simple articulator.

首先通过构造圆柱面上点的高斯图和任意采样的方法，计算出简单牙合架转动轴线方程。