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加权抽样

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There are two findings summarized from previous studies:(1) the least squares estimator is a common choice of researchers, but under an unequal probability design, the estimator is biased,(2) the probability weighted estimator is consistent but may have a large variance.

过去的研究发现:(1)在不等机率抽样时,一般常用的最小平方法所得到的回归参数估计式并非不偏估计式;(2)机率加权最小平方法可以改善不偏性,然却增加估计的变异程度。

A sampling inspection method of Binomial distribution based on sequential posterior odd test was discussed in detail, which was used to the test for torpedo system.

Bayes理论是分析研究具有小子样特点鱼雷可靠性的有效方法,文中基于序贯验后加权检验的思想,给出针对二项分布的抽样检验基木方法,并将其应用在鱼雷系统抽样检验试验中。

The simulation results show that probability weighted least squares estimator and Quasi-Aitken weighted least squares estimator are unbiased estimators of regression coefficients.

研究方法系采用Monte Carlo模拟方式模拟比较最小平方法、分层加权最小平方法、机率加权最小平方法及Quasi-Aitken机率加权最小平方法在分层不等机率抽样下的表现。

In chapter 10, we propose the random weighting approximation method for distribution of sample mean under simple random sampling in one-dimensional finite population.

第十章 将随机加权法首次应用到简单随机抽样方案下的样本均值分布逼近问题中,从数字特征角度说明了随机加权方法在抽样理论中的可用性,从而拓广了随机加权法的应用范围。

Its main characteristics are on-line processing, slip weighted average sampling followed by linear fitting, and automatic correcting of K values.

其主要特点是在网上处理,防滑加权平均抽样其次是线性拟合,和K值自动纠正。

推荐网络例句

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。