排序方式: 共有57条查询结果,搜索用时 15 毫秒
1.
It is shown that the uncertainty connected with a `random in a broad sense' (not necessarily stochastic) event always has some `statistical regularity' (SR) in the form of a family of finite-additive probability distributions. The specific principle of guaranteed result in decision making is introduced. It is shown that observing this principle of guaranteed result leads to determine the one optimality criterion corresponding to a decision system with a given `statistical regularity'. 相似文献
2.
少数民族高考加分政策实施多年,其公正性屡遭质疑,根本原因在于对该政策的根据缺乏深入而系统的认识。事实上,理性约定和平等原则构成其法律基础,循环累积因果论和帕累托最优为其提供经济学上的理论依据,唯有从这两方面厘清该政策的正当性根据,方可消除种种分歧以及在执行和实施过程中的异化和不合理现象。 相似文献
3.
《统计学通讯:理论与方法》2013,42(12):2683-2697
In this paper optimal experimental designs for multilevel models with covariates and two levels of nesting are considered. Multilevel models are used to describe the relationship between an outcome variable and a treatment condition and covariate. It is assumed that the outcome variable is measured on a continuous scale. As optimality criteria D-optimality, and L-optimality are chosen. It is shown that pre-stratification on the covariate leads to a more efficient design and that the person level is the optimal level of randomization. Furthermore, optimal sample sizes are given and it is shown that these do not depend on the optimality criterion when randomization is done at the group level. 相似文献
4.
Multi-phase sampling (M-PhS) scheme is useful when the interest is in the estimation of the population mean of an expensive
variable strictly connected with other cheaper (auxiliary) variables. The MSE is an accuracy measure of an estimator. Usually
it decreases as the sample size increases. In practice the sample size cannot become arbitrarily large for possible cost constraints.
From a practical point of view it would be useful to know the sample sizes which guarantee the best accuracy of the estimates
for fixed costs. These “optimum” sample sizes can be, in some cases, computable but not admissible. In other cases, they can
be neither admissible nor computable. The main goal of this paper is to propose a solution for both these situations. It will
be clear that in both situations the solution is to consider a M-PhS scheme with one or more phases less. 相似文献
5.
M. E. Thompson 《Journal of statistical planning and inference》1984,10(3):323-334
A correspondence rule is suggested for the choice of a sampling design when prior knowledge concerning a finite population is available. Designs satisfying the correspondence rule are discussed in the case of random permutations models. A general optimality theorem is given for strategies under such models. Approximate correspondences satisfied by systematic sampling and πps sampling are also indicated. 相似文献
6.
Lakhbir Singh Hayre 《Journal of statistical planning and inference》1982,6(2):127-130
It is shown that a two population sequential probability ratio test studied by a number of recent authors in the context of sequential medical trials is asymptotically optimal. 相似文献
7.
The aim of this note is to suggest a revised formulation of the universal optimality criterion for full rank models as stated in Kiefer (1975). We have presented the relevant results with indications of some possible applications. 相似文献
8.
L. Pesotchinsky 《Journal of statistical planning and inference》1978,2(2):173-188
Designs for quadratic regression on a cube, on a cube with truncated vertices and on a ball are studied in terms of a family of criteria, introduced by Kiefer (1974, 1975), that includes A-, D- and E-optimality. Both theoretical and numerical results on structure and performance are presented. In particular, D- and E-optimal designs are described and a procedure of construction of nearly robust (under variation of criterion) integer designs is suggested. Some examples are given for dimensions 4, 5 and 6. 相似文献
9.
J.A. Eccleston 《Journal of statistical planning and inference》1980,4(3):291-297
The construction of experimental designs by recursive techniques is studied in this paper. Formulae for the recursive addition or deletion of data from a design are derived for a typical sub-hypothesis situation of a general experimental design. These results are used to consider the recursive construction of experimental designs with respect to different optimality criteria. This approach to the construction of designs is quite different to that of the well-established theory of optimal design. 相似文献
10.
ABSTRACTThis paper presents systematic methods of construction of optimal block designs for a double cross experiments for both even and odd values of “p” parental lines. The both even and odd values of designs are derived by using initial block of unreduced balanced incomplete block designs and initial block of row–column designs given by Bose et al. (1953) and Gupta and Choi (1998), respectively. In this attempt we have found some new universally optimal block designs for double cross experiments. 相似文献