Populations, random samples. Sample statistics, moments of the sample mean and variance.
母体，随机样本。样本统计， 样本平均数和变异数的动差。
This components of parameter variance depends on the sample size.
参数方差的这一组成部分依赖于样本容量。
However, these methods are estimated according to sample variance and covariance estimators of returns.
然而，这些方法都是根据样本的变异数或报酬的共变异数估算的估计值。
In this paper, We give the sample breakdown point of a test for moment estimation of population variance and analyze the asymptotically normal characteristic of the sample breakdown point.
本文给出了总体方差矩估计检验的样本崩溃点，并分析了该样本崩溃点的渐近正态性。
In local chemical exploration, the variance analysis of three-stage-model must be applied to estimate analytical uncertainly and sample-collecting error.
在区域化探中必须应用三层套合方差分析对样品的采样误差和分析误差进行统计分析。
METHODS: Random sample questionnaire survey was conducted among consumers in Baoding city and its surrounding counties, and the data were subjected tot-test, analysis of variance, and LSD-t test.
方法：对保定市及周边县城消费者进行随机抽样问卷调查，采用t检验、方差分析和LSD - t检验等方法对调查数据进行统计学处理。
In particular, we focus discussion on joint confidence sets of the parameter mean and variance when a rounded sample comes from the normal distribution with both parameters unknown.
特别地，本文集中讨论当数据是来自参数未知的正态分布四舍五入后的数据，均值和方差的联合置信集。
At first, we analyze sample index funds' historical risk levels as well as their risk structure by means of decomposition of tracking error variance.
首先，对样本指数基金的跟踪误差方差进行分解，分析其历史风险水平；然后，引入压力测试，预测样本指数基金未来的风险水平。
We give the approximation formulas of the variance of the sample ratio estimator for a population mean and its asymptotically non-biased estimator in multi-stage sampling.
讨论多阶段抽样比率估计及其样本量选择的问题，给出了比率估计抽样均方误差的近似公式及其渐近无偏估计的公式。
We give the approximation formulas of the variance of the sample ratio estimator for a population mean and its asymptotically non-biased estimator in multi-stage sampling.
讨论多阶段抽样比率估计及其样本量选择的问题，给出了比率估计抽样均方误差的近似公式及其渐近无偏估计的公式。
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