如果要求对抽样总体出具意见，则必须针对抽样总体的检验和抽样，提前与本公司制定有关的书面安排。
If an opinion on the bulk is requested special arrangements in writing must be made in advance with the Company for the inspection and sampling of the bulk.
没有可靠和严谨的抽样技术保证，对总体的推断纯属无稽之谈。
No reliable and rigorous sampling techniques that the overall reasoning is sheer nonsense.
目的：为全国血吸虫病抽样调查居民血吸虫感染度的总体参数建立统计学方法。
AIM: to set up statistical methods for calculation of intensity of schistosome infection in residents in nationwide sampling survey of schistosomiasis.
讨论了等距抽样中，如何利用辅助信息改进总体平均值的估计，以达到提高估计精度之目的。
This paper deals with the estimation of population mean in systematic sampling by use of auxiliary information in order to improve the accuracy of the estimate.
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。
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.
校正估计法已被大量运用于抽样调查中，它利用辅助信息构造的校正权重提高了对总体总值(或均值)的估计精度。
Calibration estimation which USES known auxiliary information at the estimation stage to improve the precision of the estimators of totals and means has been widely used in survey sampling.
在假设总体服从正态分布的条件下，设计了抽样区间，样本容量和控制限都变化的全变化参数的中位值-极差联合控制图。
Under population follow normal distribution hypothesis, designing combine median-range adaptive control charts with variable sampling interval, variable sample size and variable control limit .
对有限总体在不放回抽样的方法下，构造了一类非线性回归估计量，讨论了它的性质及其有关抽样误差．。
A kind of nonlinear regression estimator for limited Population is given and the quality and the sampling variance about is discussed.
为了能估计流量总体统计属性，抽样样本需要具有统计随机性。
And in order to estimate the character of traffic statistics, the traffic sample should be random in statistics.
本文在分层随机抽样下通过使用辅助变量的偏斜系数提出了几个总体均值的估计。
The paper proposes new separate ratio estimators for population mean using known skewness coefficient of auxiliary variable in stratified random sampling.
分析表明，总体变异系数较低，总株数较多的样地，有着更好的抽样效果。
It was demonstrated that the lower CV, the larger the number of all trees, the better effectivity this sampling technique had.
线采样系统提出以线状样区代替以往成数抽样中的点样区与面积样区概念，通过统计线状样区内作物种植面积成数来反映区域总体农作物种植面积成数。
The GVG system is a new solution, with the conception of sampling lineage instead of the traditional sampling point or sampling area, to extracting crop acreage information.
散料抽样的目的是为了对总体质量进行估计，以方便定价或进行生产质量控制等。
The bulk sampling discussed in this paper is primarily interested in estimating the mean quality of the bulk material with reasonable cost, so as to adjust the price and process duly when necessary.
对抽样控制总体法中的差值（累偏）衡量的尺度进行了分析，指出用允许误差作尺度是恰当的，若用标准误作尺度势必造成小班调查的大量返工。
Using allowance error as the dimesion was proper, whereas adopting standarderror as the dimension might cause the high frenquence rework of compartment inventory.
抽样分布样本效果大小的平均值可以作为总体效果大小的估计值 ，它与样本容量和抽样样本数目有密切关系 ；
The simulated experimental results showed that significance t testing is highly related to population distribution effect size and sample capacities, yet rarely related to the numbers of rand…
抽样分布样本效果大小的平均值可以作为总体效果大小的估计值 ，它与样本容量和抽样样本数目有密切关系 ；
The simulated experimental results showed that significance t testing is highly related to population distribution effect size and sample capacities, yet rarely related to the numbers of rand…
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