共查询到20条相似文献,搜索用时 64 毫秒
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国家统计局在《国家统计制度改革总体方案》中提出要加快统计调查方法的改革,拟定的长远目标是:“建立以必要的周期性普查为基础,以经常性的抽样调查为主体,同时辅之以重点调查等多种方法综合运用的统计调查方法体系。”为了实现上述目标,在总结二十年统计调查方法改... 相似文献
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传统的信息价值求解方法在行动选择或实验结果情况很多的情况下,步骤繁琐,计算量大,引起众多麻烦.而决策树方法是辅助行动选择的重要参考,并且在excel的宏工具容易求解.文章用决策树的思路和方法求解决策问题中的信息价值,给出了方法合理性的证明,并结合实例演示了求解方法. 相似文献
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多指标综合评价方法及方法选优研究 总被引:3,自引:0,他引:3
目前已提出的综合评价方法有很多,但问题在于对同一个评价对象,各种评价方法得出的结论往往不一致。笔者在序号总和理论、众数理论、集值统计研究成果的基础上,提出了一种区间综合评价合成技术并给出针对综合评价方法选优问题的量化检验标准。 相似文献
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当今人口预测的标准模式为队列因素法,鉴于参数的估计方法不同,该方法又可分为场景预测方法和概率预测方法。文章认为,从统计学的视角看,概率预测方法更科学、更合理。由于场景预测方法概念简单,对数据要求低,可以充分利用专家的主观预测成果,同时预测方法简便易行,目前应用广泛。概率预测方法对数据的数量和质量都有较高的要求,且需要较复杂的统计技术,应用受到限制。 相似文献
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预测方法有效度指标的估计方法探讨王明涛李文华人们在进行预测时,关心的问题之一就是预测的精度。要想使预测达到一定的精度,就必须选择有效的预测方法。本文试图在预测有效度的估计方法方面做一些探讨,以起到抛砖引玉的作用。一、预测方法有效度指标概述设[T1,T... 相似文献
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《Journal of statistical planning and inference》2005,131(2):253-269
The posterior mode under the standardized prior density is proposed to estimate a mean (vector) parameter, and its potential usefulness is discussed. Priors in this study include a conjugate prior and its generalized forms. When a prior density is factored into the standardized prior density and the supporting measure density, our suggestion is to discard the latter density and then to calculate the posterior mode of the mean under the standardized prior density. This treatment makes our choice of a prior density flexible. Implications of this treatment are discussed. 相似文献
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本文根据联合国《社会和人口统计体系》(SSDC)的要求,探讨用矩阵的方法对社会人口的总量、结构及其变动情况进行综合性描述和核算。 相似文献
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Sheela Talwaiker 《统计学通讯:理论与方法》2013,42(3):961-979
The solutions of Cauchy functional equation and its special cases, studied by various authors while characterizing discrete distributions by Rao-Rubin condition and its variants, axe discussed in this survey paper. Certain new results on the solutions of generalizations of these functional equations are also mentioned 相似文献
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Francisco Louzada-Neto Vicente G. Cancho Gladys D.C. Barriga 《Journal of applied statistics》2011,38(6):1239-1248
In this paper, we proposed a new two-parameter lifetime distribution with increasing failure rate. The new distribution arises on a latent complementary risk scenario. The properties of the proposed distribution are discussed, including a formal proof of its density function and an explicit algebraic formulae for its quantiles and survival and hazard functions. Also, we have discussed inference aspects of the model proposed via Bayesian inference by using Markov chain Monte Carlo simulation. A simulation study investigates the frequentist properties of the proposed estimators obtained under the assumptions of non-informative priors. Further, some discussions on models selection criteria are given. The developed methodology is illustrated on a real data set. 相似文献
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This paper contains a study of the qualitative properties of the maximum likelihood estimate of the scale parameter of the Student family as a function of its (continuous) degrees of freedom. Sharp bounds are provided for the estimate and its (continuous) degrees of freedom. Sharp bounds are provided for the estimate and its monotonicity as a function of the degrees of freedom is established. Inferential implications are also discussed. 相似文献
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Gregory A. Mack 《统计学通讯:模拟与计算》2013,42(6):571-591
A distribution-free test for main-effects in a two-factor ANOVA is studied and an extensive set of tables for its exact null distributions is presented. Two different large sample approximations for its null distributions are discussed and the adequacy of each approximation is studied. Recommendations are made concerning the sample sizes required for the use of each of these approximations. 相似文献
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Weibull, Burr, Pareto and power function distributions have been characterized through the conditional moments of order statistics with higher gap and some of its important deductions are discussed. 相似文献
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Timo Teräsvirta 《统计学通讯:理论与方法》2013,42(14):1595-1601
In the paper homogeneous linear estimators of the parameter vector of the general linear model are compared in terms of their MSE matrices. A necessary and sufficient condition for the difference of two MSE matrices to be positive definite is obtained and its practical existence discussed. The non-negative definiteness of the difference also receives attention, and conditions for this case are discussed. The absence of any conditions of the above type is taken into consideration as well. 相似文献