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作者：Ge, NX; Simpson, DG
作者单位：University of Illinois System; University of Illinois Urbana-Champaign
摘要：Classical discriminant analysis breaks down when the feature vectors are of extremely high dimension; for example, when the basic observation is a random function observed over a fine grid. Alternative methods have been developed assuming a simplified form for the covariance structure. We analyze the high-dimensional asymptotics of some of these methods, emphasizing the effects of correlations such as occur when the baseline is random. For instance, the Euclidean distance classifier, which has...
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作者：Gersovitz, M; Jacoby, HG; Dedy, FS; Tape, AG
作者单位：Johns Hopkins University; The World Bank; Ecole Normale Superieure (ENS) d'Abidjan
摘要：The AIDS epidemic in Africa depends on heterosexual behavior, about which little is known. National Knowledge, Attitudes and Practices (KAP) surveys are a potentially important data source but are compromised because women report less-often, much less-sexual activity than men. This imbalance is investigated using questions on the type of activity (with regular or casual partners and involving compensation) and on the duration of abstinence (time since last act), as well as other socioeconomic ...
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作者：Wang, YN; McDermott, MP
作者单位：University of Rochester
摘要：The conditional likelihood ratio test is derived for significance of a multivariate mean having nonnegative components. This test is shown to be uniformly more powerful than the unconditional likelihood ratio test derived by Perlman. The computation involved in the new test is a straightforward progamming task. Simulation results suggest that this test is also uniformly more powerful than a half-space test proposed by Tang and Hotelling's T-2 test. The consistency, invariance and unbiasedness ...
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作者：Lange, N
作者单位：Harvard University; Harvard Medical School; Harvard University; Harvard University Medical Affiliates; McLean Hospital
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作者：Neuhaus, JM
作者单位：University of California System; University of California San Francisco
摘要：Although omitting covariates associated with the response in generalized linear models can yield seriously biased estimates of the effects of the included covariates, in certain settings there is no bias. This article considers the effect of omitted covariates on the efficiency of the estimated effects of the included covariates in these cases. I consider the case where the omitted covariate is independent of the included covariates, as in studies with randomized treatment assignment, as well ...
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作者：Paul, SR; Banerjee, T
作者单位：University of Windsor; University of Calcutta
摘要：Multiple counts may occur in each cell of an a x b two-way layout (balanced or unbalanced) of two fixed factors A and B. Standard log-linear model analysis based on a Poisson distribution assumption of the cell counts is not applicable here, because of the unbalanced nature of the table or because the Poisson distribution assumption is not valid. We develop C(alpha) tests for interaction and main effects assuming data to be Poisson distributed and also assuming that data within the cells have ...
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作者：Binder, DA
作者单位：Statistics Canada
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作者：Cook, RD; Croos-Dabrera, R
作者单位：University of Minnesota System; University of Minnesota Twin Cities; Clarkson University
摘要：In this article we explore the structure and usefulness of partial residual plots as tools for visualizing curvature as a function of selected predictors xa in a generalized linear model (GLM), where the vector of predictors x is partitioned as x(T) = (x(1)(T),x(2)(T)). The GLM extension of CERES plots is discussed, but to a lesser extent. The usefulness of these plots for obtaining a good visual impression of curvature may be limited by the specified GLM, the link function, and the stochastic...
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作者：Huang, LS
摘要：A test for the one-sample goodness-of-fit problem is proposed. The test is based on a distance that measures the difference, in terms of roughness, between the underlying density function and the hypothesized density function. One advantage of using a roughness measure is high power in detecting high-frequency alternatives and densities with sharp features. The test statistic that estimates the distance is derived from the viewpoint of kernel density estimation, and a testing procedure is deve...
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作者：Kettenring, JR
作者单位：Telcordia Technologies
