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作者：van de Wiel, MA
作者单位：Eindhoven University of Technology
摘要：Computation of exact p values of multiple comparisons rank statistics is often a very time-consuming task. In some cases approximations are available, but they are often unsatisfactory when samples are small or the number of ties is large. Some existing tables of exact critical values contain errors and are limited to small samples without ties and to Wilcoxon scores. Therefore, this article proposes a new algorithm to compute exact p values of generalized Steel statistics for one-way classifi...
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作者：Saltelli, A; Tarantola, S
作者单位：European Commission Joint Research Centre; EC JRC ISPRA Site
摘要：This article deals with global quantitative sensitivity analysis of the Level E model, a computer code used in safety assessment for nuclear waste disposal. The Level E code has been the Subject of two international benchmarks of risk assessment codes and Monte Carlo methods and is well known in the literature. We discuss the Level E model with reference to two different settings. In the first setting, the objective is to find the input factor that drives most of the output variance. In the se...
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作者：Lin, HQ; Turnbull, BW; McCulloch, CE; Slate, EH
作者单位：Yale University; Cornell University; University of California System; University of California San Francisco; Medical University of South Carolina
摘要：A retrospective substudy of the nutritional prevention of cancer (NPC) trials investigated the utility of longitudinally measured prostate-specific antigen (PSA) as a biomarker for subsequent onset of prostate cancer (PCa). Serial PSA levels were determined retrospectively from frozen blood samples that had been collected from all patients at successive clinic visits with the timing and the number of these visits highly variable. Diagnosis dates of all incident cases of PCa were recorded. Hete...
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作者：Sitter, RR; Wu, CB
作者单位：Simon Fraser University; University of Waterloo
摘要：By viewing quadratic and other second-order finite population functions as totals or means over a derived synthetic finite population, we show that the recently proposed model calibration and pseudoempirical likelihood methods for effective use of auxiliary information from survey data can be readily extended to obtain efficient estimators of quadratic and other second-order finite population functions. In particular, estimation of a finite population variance, covariance, or variance of a lin...
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作者：Braun, TM; Feng, ZD
作者单位：University of Michigan System; University of Michigan; Fred Hutchinson Cancer Center
摘要：Two facts complicate the comparison of interventions in group randomized trials (GRT's), a family of clinical trials in which each member of a particular group receives the same treatment assignment. First, individual outcomes within each group are often correlated. Second, the number of groups in a GRT is often not sufficient to make asymptotic approximations possible. Therefore, the tests used with methods, such as generalized estimating equations (GEE) and penalized quasi likelihood (PQL), ...
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作者：Quinn, TJ II; Mizroch, SA
作者单位：University of Alaska System; University of Alaska Fairbanks; National Oceanic Atmospheric Admin (NOAA) - USA
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作者：Peel, D; Whiten, WJ; McLachlan, GJ
作者单位：University of Queensland
摘要：When examining a rock mass, joint sets and their orientations can play a significant role with regard to how the rock mass will behave. To identify joint sets present in the rock mass, the orientation of individual fracture planer can be measured on exposed rock faces and the resulting data can be examined for heterogeneity. In this article, the expectation-maximization algorithm is used to lit mixtures of Kent component distributions to the fracture data to aid in the identification of joint ...
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作者：Klaassen, FJGM; Magnus, JR
作者单位：University of Amsterdam; Tilburg University
摘要：This article tests whether points in tennis are independent and identically distributed (iid). We model the probability of winning a point on service and show that points are neither independent nor identically distributed: winning the previous point has a positive effect on winning the current point, and at important points it is more difficult for the server to win the point than at less important points. Furthermore, the weaker a player, the stronger are these effects. Deviations from lid a...
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作者：Ishwaran, H; James, LF
作者单位：Cleveland Clinic Foundation; Johns Hopkins University
摘要：A rich and flexible class of random probability measures, which we call stick-breaking pliers, can be constructed using a sequence of independent beta random variables. Examples of random measures that have this characterization include the Dirichlet process, its two-parameter extension, the two-parameter Poisson-Dirichlet process, finite dimensional Dirichlet priors, and beta two-parameter processes. The rich nature of stick-breaking priors offers Bayesians a useful class of priors for nonpar...
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作者：Antoniadis, A; Fan, JQ
作者单位：Communaute Universite Grenoble Alpes; Universite Grenoble Alpes (UGA); Chinese University of Hong Kong
摘要：In this paper, we introduce nonlinear regularized wavelet estimators for estimating nonparametric regression functions when sampling points are not uniformly spaced. The approach can apply readily to many other statistical contexts. Various new penalty functions are proposed. The hard-thresholding and soft-thresholding estimators of Donoho and Johnstone are specific members of nonlinear regularized wavelet estimators. They correspond to the lower and upper envelopes of a class of the penalized...
