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揭示了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,提出了总体方差已知条件下单个正态总体均值假设检验的改进方法,给出了一个该总体方差已知条件下单个正态总体均值假设检验改进方法的应用实例. 相似文献
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基于总体分布有偏并假定总体分布未知情况下均值-极差控制图的控制限的研究结果,将其推广到EWMA均值控制图,给出总体分布有偏并假定总体分布未知情况下EWMA均值控制图的控制界限,并以质量特性值服从对数正态分布为例,给出EWMA均值控制图的控制效果的模拟分析. 相似文献
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基于尺度赋权方差法给出总体分布有偏并假定总体分布未知情况下休哈特均值控制图的控制限.基于此研究结果,将其推广到EWMA均值控制图,给出总体分布有偏并假定总体分布未知情况下EWMA均值控制图的控制界限,并以质量特性值服从对数正态分布为例,给出EWMA均值控制图的控制效果的模拟分析. 相似文献
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本文将[1]提出的一维异方差正态总体均值的加权T-统计量估计推广到多维异方差正态总体均值的估计,并应用于其假设检验。 相似文献
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《应用概率统计》2019,(3)
候选者数据库网络调查的推断问题是网络调查发展中迫切需要解决的问题.基于此,提出基于超总体伪设计与组合样本的非概率抽样推断方法:对网络候选者数据库的调查样本建立超总体模型来构造伪权数,并根据网络候选者数据库的调查样本和概率样本的组合样本计算总体均值的估计,最后根据超总体模型的方差估计理论推导出目标总体均值估计的方差估计式,同时采用Bootstrap与Jackknife方法来估计总体均值估计的方差,并比较不同方差估计方法的效果.研究结果表明:基于超总体伪设计与组合样本的总体均值估计效率高于仅使用概率样本的估计和仅使用网络候选者数据库的调查样本加权的估计,估计效果较好;方差估计方面,采用VM1、VM2与VM3方法计算的方差估计相比而言更好. 相似文献
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在工序质量控制中,画控制图的传统作法是用样本均值近似代替总体的均值.由于样本的随机性,因此,估计误差在所难免.本文用Bayes方法将用样本均值χ代替总体均值μ所产生的估计误差一并计入到总体X所固有的随机性之中,从而修正了传统的质量控制界限的画法 相似文献
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文章研究基于替代与核实数据样本下总体均值的估计问题,
利用核权函数法定义了一个总体均值的估计量,
它包含了替代数据和核实数据两方面信息. 并证明了该估计量的渐进正态性,
同时给出估计量的收敛速度. 相似文献
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Dan Shen Haipeng Shen Shankar Bhamidi Yolanda Muñoz Maldonado Yongdai Kim J. S. Marron 《Journal of computational and graphical statistics》2013,22(2):418-438
Data analysis on non-Euclidean spaces, such as tree spaces, can be challenging. The main contribution of this article is establishment of a connection between tree-data spaces and the well-developed area of functional data analysis (FDA), where the data objects are curves. This connection comes through two tree representation approaches, the Dyck path representation and the branch length representation. These representations of trees in the Euclidean spaces enable us to exploit the power of FDA to explore statistical properties of tree data objects. A major challenge in the analysis is the sparsity of tree branches in a sample of trees. We overcome this issue by using a tree-pruning technique that focuses the analysis on important underlying population structures. This method parallels scale-space analysis in the sense that it reveals statistical properties of tree-structured data over a range of scales. The effectiveness of these new approaches is demonstrated by some novel results obtained in the analysis of brain-artery trees. The scale-space analysis reveals a deeper relationship between structure and age. These methods are the first to find a statistically significant gender difference. Supplementary materials for this article are available online. 相似文献
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替代数据检验法是检验时间序列中是否存在确定性非线性成分的重要统计方法.通过研究差分和数据平滑运算对替代数据检验方法的影响,指出常用的线性滤波等数据预处理步骤破坏了序列的静态性质,从而会导致对零假设的错误拒绝.因此,建议应该直接利用原始时间序列而非应用了差分等非静态滤波运算后的时间序列生成替代数据,再进行假设检验,以免造成对零假设的错误拒绝. 相似文献
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Wade D. Cook Moshe Kress Lawrence M. Seiford 《The Journal of the Operational Research Society》1993,44(2):133-140
In many problems involving efficiency analysis using DEA, certain factors may be measurable only on an ordinal scale. Specifically, it may be possible only to rank order the DMUs according to a factor, rather than being able to assign a specific numerical value of that factor to each DMU. To illustrate this, we examine a problem involving the evaluation of new technology installations. The presence of qualitative factors in such an environment motivates the need to investigate how such factors can be incorporated into existing efficiency measurement models. In particular, a procedure is presented for incorporating an ordinal factor into the DEA structure, with the resulting formulation being a particular form of cone ratio model. The model is then applied to the technology installation efficiency problem. 相似文献
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Chong Gu 《Journal of computational and graphical statistics》2013,22(2):169-179
Abstract This article describes an appropriate way of implementing the generalized cross-validation method and some other least-squares-based smoothing parameter selection methods in penalized likelihood regression problems, and explains the rationales behind it. Simulations of limited scale are conducted to back up the semitheoretical analysis. 相似文献