全文获取类型
收费全文 | 1054篇 |
免费 | 9篇 |
专业分类
管理学 | 19篇 |
民族学 | 1篇 |
人口学 | 3篇 |
丛书文集 | 15篇 |
理论方法论 | 9篇 |
综合类 | 63篇 |
社会学 | 13篇 |
统计学 | 940篇 |
出版年
2023年 | 1篇 |
2021年 | 2篇 |
2020年 | 8篇 |
2019年 | 22篇 |
2018年 | 26篇 |
2017年 | 44篇 |
2016年 | 23篇 |
2015年 | 21篇 |
2014年 | 21篇 |
2013年 | 434篇 |
2012年 | 112篇 |
2011年 | 21篇 |
2010年 | 17篇 |
2009年 | 20篇 |
2008年 | 26篇 |
2007年 | 27篇 |
2006年 | 16篇 |
2005年 | 19篇 |
2004年 | 21篇 |
2003年 | 22篇 |
2002年 | 16篇 |
2001年 | 25篇 |
2000年 | 16篇 |
1999年 | 10篇 |
1998年 | 11篇 |
1997年 | 11篇 |
1996年 | 6篇 |
1995年 | 7篇 |
1994年 | 10篇 |
1993年 | 3篇 |
1992年 | 3篇 |
1991年 | 1篇 |
1990年 | 5篇 |
1989年 | 4篇 |
1988年 | 2篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 2篇 |
1984年 | 5篇 |
1983年 | 8篇 |
1982年 | 4篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1978年 | 2篇 |
1977年 | 2篇 |
1975年 | 1篇 |
排序方式: 共有1063条查询结果,搜索用时 937 毫秒
91.
A unified approach is developed for testing hypotheses in the general linear model based on the ranks of the residuals. It complements the nonparametric estimation procedures recently reported in the literature. The testing and estimation procedures together provide a robust alternative to least squares. The methods are similar in spirit to least squares so that results are simple to interpret. Hypotheses concerning a subset of specified parameters can be tested, while the remaining parameters are treated as nuisance parameters. Asymptotically, the test statistic is shown to have a chi-square distribution under the null hypothesis. This result is then extended to cover a sequence of contiguous alternatives from which the Pitman efficacy is derived. The general application of the test requires the consistent estimation of a functional of the underlying distribution and one such estimate is furnished. 相似文献
92.
In this paper, we have studied some implications between tail-ordering (also known as dispersive ordering) and failure rate ordering (also called TP2 ordering) of two probability distribution functions. Based on independent random samples from these distributions, a class of distribution-free tests has been proposed for testing the null hypothesis that the two life distributions are identical against the alternative that one failure rate is uniformly smaller than the other. The tests have good efficiencies as compared to their competitors. 相似文献
93.
94.
We study the effects of the inclusion of pairs of correlated observations in a sample on likelihood ratio tests for the difference in two means. In particular, we assess how the inclusion of correlated data pairs (e.g., such as data inadvertently collected from sib-pairs) affects the sample size requirements necessary for the implementation of a Likelihood Ratio (LR) test for the difference between two means. Our results suggest that correlated data pairs beneficially or adversely effect sample size requirements for an LR test to a degree functionally related to the mixture parameters dictating their relative frequencies in the larger sample on which the test will be performed, the strength of the correlation between the observations, and the size of imbalances in the sample with respect to the number of observations in each group. The relevance and implications of the results for genetic and epidemiologic research are discussed. 相似文献
95.
Blest (2000, Aust. N. Z. J. Stat. 42 , 101–111) proposed a new measure of rank correlation that is sensitive to discrepancies in the small ranks. This paper investigates the efficiency properties of non‐parametric tests for independence based on Blest's correlation coefficient and its modifications. Pitman efficiency comparisons are made with analogous tests existing in the literature. Conditions for Pitman optimality of the Blest‐type tests are established. 相似文献
96.
We derive a non-parametric test for testing the presence of V(Xi ,εi ) in the non-parametric first-order autoregressive model Xi+1 =T(Xi )+V(Xi ,εi )+U(Xi )εi+1 , where the function T(x) is assumed known. The test is constructed as a functional of a basic process for which we establish a weak invariance principle, under the null hypothesis and under stationarity and mixing assumptions. Bounds for the local and non-local powers are provided under a condition which ensures that the power tends to one as the sample size tends to infinity.The testing procedure can be applied, e.g. to bilinear models, ARCH models, EXPAR models and to some other uncommon models. Our results confirm the robustness of the test constructed in Ngatchou Wandji (1995) and in Diebolt & Ngatchou Wandji (1995). 相似文献
97.
Lehmann & Stein (1948) proved the existence of non-similar tests which can be more powerful than best similar tests. They used Student's problem of testing for a non-zero mean given a random sample from the normal distribution with unknown variance as an example. This raises the question: should we use a non-similar test instead of Student's t test? Questions like this can be answered by comparing the power of the test with the power envelope. This paper discusses the difficulties involved in computing power envelopes. It reports an empirical comparison of the power of the t test and the power envelope and finds that the two are almost identical especially for sample sizes greater than 20. These findings suggest that, as well as being uniformly most powerful (UMP) within the class of similar tests, Student's t test is approximately UMP within the class of all tests. For practical purposes it might also be regarded as UMP when moderate or large sample sizes are involved. 相似文献
98.
Andreas Ziegler 《Statistical Papers》2007,48(4):655-681
This paper compares the application of different versions of the simulated counterparts of the Wald test, the score test,
and the likelihood ratio test in one- and multiperiod multinomial probit models. Monte Carlo experiments show that the use
of the simple form of the simulated likelihood ratio test delivers relatively robust results regarding the testing of several
multinomial probit model specifications. In contrast, the inclusion of the Hessian matrix of the simulated loglikelihood function
into the simulated score test and (in the multiperiod multinomial probit model) particularly the inclusion of the quasi-maximum
likelihood theory into the simulated likelihood ratio test leads to substantial computational problems. The combined application
of the quasi-maximum likelihood theory with the simulated Wald test or the simulated score test is not systematically superior
to the application of the other versions of these two simulated classical tests either. Neither an increase in the number
of observations nor in the number of random draws in the incorporated Geweke-Hajivassiliou-Keane simulator systematically
lead to more precise conformities between the frequencies of type I errors and the basic significance levels. An increase
in the number of observations only decreases the frequencies of type II errors, particularly regarding the simulated classical
testing of multiperiod multinomial probit model specifications. 相似文献
99.
周胜 《佛山科学技术学院学报(社会科学版)》2004,22(1):67-71
直接与间接是矛盾的,同时又是统一的.这种对立统一主要体现在直接言语行为和间接言语行为、直接测试和间接测试以及直接教学法和间接教学法三方面. 相似文献
100.
We are concerned with three different types of multivariate chi-square distributions. Their members play important roles as limiting distributions of vectors of test statistics in several applications of multiple hypotheses testing. We explain these applications and consider the computation of multiplicity-adjusted p-values under the respective global hypothesis. By means of numerical examples, we demonstrate how much gain in level exhaustion or, equivalently, power can be achieved with corresponding multivariate multiple tests compared with approaches which are only based on univariate marginal distributions and do not take the dependence structure among the test statistics into account. As a further contribution of independent value, we provide an overview of essentially all analytic formulas for computing multivariate chi-square probabilities of the considered types which are available up to present. These formulas were scattered in the previous literature and are presented here in a unified manner. 相似文献