Population variance

Research on Check for Multi - Population Variance

多总体方差检验之探讨

Comparision the Some Estimators of the Normal Population Variance

正态总体方差几类估计量的比较

The sample breakdown point of a test for moment estimation of population variance

总体方差矩估计检验的样本崩溃点

Selection of the Sample Quantity in Estimating Population Variance

估计总体方差时样本容量的选取

Scholars introduced different opinions on urbanization from different points of view such as resource configuration , urban-rural relationship and population variance .

学者们从不同的视角提出了不同的理解，有人从资源配置界定人口城市化，有人从城乡关系界定人口城市化，也有人从人口变迁界定人口城市化。

This paper proposed an algorithm for finding critical value of normal population variance under unbiassed tests with uniform dominance .

本文给出了求正态总体方差的一致最优化无偏检验的临界值的算法。

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。

Best Unbiased Estimator for Trend & A Method of Getting Trend of Digital Elevation Model This paper proposed an algorithm for finding critical value of normal population variance under unbiassed tests with uniform dominance .

数字高程模型中求趋势的一种方法&无偏最优求趋势法本文给出了求正态总体方差的一致最优化无偏检验的临界值的算法。

Abstract In this paper the pressing criterion of appreciation estimator was presented . and the property of maximum likelihood estimator of normal population variance σ 2 and uniformly distributed parameter θ was discussed .

本文提出评价估计量的贴近标准，并用该标准讨论了正态分布总体方差σ2及均匀分布参数θ的极大似然估计的一些性质。

On this basis , Mathematics circle give rational thinking and study of different sample methods In the real work and obtain the conclusion : The variance of the sample is that population variance has no estimator of leaning towards in sampling unrestrictedly and Simple random sampling .

在此基础上数学界将实际工作中各种可能始点的抽样方法赋予理性思考、研究，获得结论：无限制抽样和简单随机抽样条件下样本方差是总体方差的无偏估计量。

With the changes of grazing intensity , the dominant status of main plant population would be variance .

随牧压梯度的变化，群落主要植物种群的优势地位发生变化。

Results Formulas for the estimation of the population proportions and its variance on additive model for quantitative sensitive question survey were deduced .

结果推导出数量特征敏感问题加法模型二阶段抽样调查总体均值的估计量及其方差、估计方差的计算公式。

Normal distribution is a distribution which is widely applied in statistics . The parameters of normal population about mean and variance are particularly important . It is a wide range of outlook and universal in production and practice .

正态分布是一种应用广泛的重要统计分布，其中参数均值和方差尤为重要，在生产和实践中具有广泛的应用前景和普适性。

Population genetical structure , variance , differentiation , adaptation and its relations to environments , ecotypes and their genetic background , and polymorphism , etc. are chiefly researched in genetical ecology .

遗传生态学主要集中在种群遗传结构，变异、分化、适应及其与环境的关系，生态型及其遗传基础，多态性等。

Defects and Improvement of Current Methodology in Hypothesis Testing for a Single Population Mean under Normal Distribution and Known Population Variance

总体方差已知条件下单个正态总体均值假设检验现行方法的缺陷与改进

Calculates the standard deviation based on the entire population of selected database entries This paper proposed an algorithm for finding critical value of normal population variance under unbiassed tests with uniform dominance .

以数据库选定项（指定字段中满足给定条件的数据项）作为样本总体，计算数据的标准偏差本文给出了求正态总体方差的一致最优化无偏检验的临界值的算法。