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排序方式: 共有89条查询结果,搜索用时 375 毫秒
1.
《Journal of Statistical Computation and Simulation》2012,82(2-3):133-143
Goodness—of—fit statistics based on the empirical distribution function (EDF) are not distribution—free when parameters for the hypothesized distribution are estimated. Tables are percentile values of several EDF statistics are available for the two—parameter Weibull distribution when parameters are estimated by maximum likelihood. To determine how these tabled values change when simpler estimators are employed, percentile scores for EDF goodness—of—fit tests were obtained by Monte—Carlo simulation for maximum likelihood estimators (MLEs), good linear unbiased estimators (GLUEs), and modified Cramer—von Mises, Anderson—Darling, and Watson statistics are presented for GLUEs for both complete and censored samples. Critical values for Kolmogorov—Smirnov statistics were less affected by the method of estimation than were closer for MLEs and MGLUEs than for MGLUEs and GLUEs. On the other hand, MGLUE and GLUE results were much more similar to each other than to the MLE results when censoring was light and sample sizes were large. 相似文献
2.
于江 《河南理工大学学报(社会科学版)》2009,10(2)
作为与广义行政管理具有密切联系的机关管理,其价值取向必然与行政管理的价值取向具有一致性,与农业、工业、信息社会相对应,行政管理的价值取向经历了由稳定→效率→治理服务的转变,相应的机关管理的价值目标也应经历这三个阶段和境界。当前机关管理的价值目标取向是以以人为本为核心,以治理理念为框架的服务社会理念。 相似文献
3.
A. Ross Eckler 《The American statistician》2013,67(1):6-10
The change from the z of “Student's” 1908 paper to the t of present day statistical theory and practice is traced and documented. It is shown that the change was brought about by the extension of “Student's” approach, by R.A. Fisher, to a broader class of problems, in response to a direct appeal from “Student” for a solution to one of these problems. 相似文献
4.
南京国民政府十年期,西方国家依仗着不平等条约所赋予的特权,以世界经济恐慌为契机,采取商品输出与资本输出等手段。向中国转嫁经济危机。处于弱势地位的华商企业及其产品难以抵挡外资企业与物美价廉。洋货”的冲击,于是大批工厂、商店、公司相继破产歇业,失业者充斥于大街小巷。加之西方国家掀起了排华运动,失业华侨纷纷回国,国内失业形势更加恶化。 相似文献
5.
6.
Roy Boyd 《Journal of Policy Modeling》1983,5(2):293-307
This article quantitatively analyzes the various impacts of current U.S. coastal restrictions on the Northwest lumber industry. The history of U.S. maritime regulation is briefly reviewed and a simulation model is developed to measure its affect on lumber shipments and transport costs. The results of the model indicate that aggregate cost redutions obtained through deregulation are likely to be small. The pattern of intercoastal shipments could change a great deal, however, with U.S. producers picking up a large share of the Northeast market. 相似文献
7.
AbstractA Marshall–Olkin variant of the Provost type gamma–Weibull probability distribution is being introduced in this paper. Some of its statistical functions and numerical characteristics among others characteristics function, moment generalizing function, central moments of real order are derived in the computational series expansion form and various illustrative special cases are discussed. This density function is utilized to model two real data sets. The new distribution provides a better fit than related distributions as measured by the Anderson–Darling and Cramér–von Mises statistics. The proposed distribution could find applications for instance in the physical and biological sciences, hydrology, medicine, meteorology, engineering, etc. 相似文献
8.
The use of the correlation coefficient is suggested as a technique for summarizing and objectively evaluating the information contained in probability plots. Goodness-of-fit tests are constructed using this technique for several commonly used plotting positions for the normal distribution. Empirical sampling methods are used to construct the null distribution for these tests, which are then compared on the basis of power against certain nonnormal alternatives. Commonly used regression tests of fit are also included in the comparisons. The results indicate that use of the plotting position pi = (i - .375)/(n + .25) yields a competitive regression test of fit for normality. 相似文献
9.
D. J. Saville 《The American statistician》2013,67(2):174-180
A practicing statistician looks at the multiple comparison controversy and related issues through the eyes of the users. The concept of consistency is introduced and discussed in relation to five of the more common multiple comparison procedures. All of the procedures are found to be inconsistent except the simplest procedure, the unrestricted least significant difference (LSD) procedure (or multiple t test). For this and other reasons the unrestricted LSD procedure is recommended for general use, with the proviso that it should be viewed as a hypothesis generator rather than as a method for simultaneous hypothesis generation and testing. The implications for Scheffé's test for general contrasts are also discussed, and a new recommendation is made. 相似文献
10.
《Journal of Statistical Computation and Simulation》2012,82(4):177-194
Formulating the model first in continuous time, we have developed a state space approach to the problem of testing for threshold-type nonlinearity when the data are irregularly spaced. 相似文献