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作者：ENSOR, KB; NEWTON, HJ
作者单位：Texas A&M University System; Texas A&M University College Station
摘要：The effect of estimating the order of an autoregressive process no estimating the peak frequency is examined. For consistent order determining methods it is shown that the asymptotic results are the same as for the case when the order is known. For the order criteria which asymptotically overestimate the order, the peak frequency estimator is shown to be a consistent estimator of the true peak frequency.
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作者：LAGAKOS, SW; BARRAJ, LM; DEGRUTTOLA, V
摘要：One source of data for the induction distribution of AIDS arises from persons infected by the AIDS virus from contaminated blood transfusions. Analyses of these data are complicated because the number of individuals infected by transfusion is unknown; information is available only for those who are infected and develop AIDS within a certain chronologic time interval. The statistical problem is one of making inferences about a stochastic process of infection and disease for which realizations a...
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作者：HALL, P; WAND, MP
摘要：We propose a technique for nonparametric discrimination in which smoothing parameters are chosen jointly, according to a criterion based on the difference between two densities. The approach is suitable for categorical, continuous and mixed data, and uses information from both populations to determine the smoothing parameter for any one population. In the case of categorical data, optimal performance is sometimes achieved using negative smoothing parameters, a property which does not emerge if...
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作者：ZHENG, ZK
摘要：A sequential plan with censored data for nonparametric testing of a hypothesis H0: F(t) = F0(t) against H1: F(t) .ltoreq. F0(t), where the inequality holds strictly for some t, is discussed. A large-sample theorem due to Gill (1983) is used and a Kolmogorov-type test is established.
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作者：CONNOLLY, MA; LIANG, KY
摘要：A class of conditional logistic regression models for clustered binary data is considered. This includes the polychotomous logistic model of Rosner (1984) as a special case. Properties such as the joint distribution and pairwise odds ratio are investigated. A class of easily computed estimating functions is introduced which is shown to have high efficiency compared to the computationally intensive maximum likelihood approach. An example on chronic obstructive pulmonary disease among sibs is pr...
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作者：GREENACRE, MJ
摘要：A generalization of correspondence analysis to multivariate categorical data is proposed, where all two-way contingency tables of a set of categorical variables are simultaneously fitted by weighted least-squares. An alternating least-squares algorithm is developed to perform the fitting. This technique has a number of advantages over the usual generalization known as multiple correspondence analysis. It is also an analogue of least-squares factor analysis for categorical data.
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作者：MUKERJEE, H
摘要：There is an extensive literature on inferences from independent random samples about several normal means under order restrictions. The purpose of this note is to point out these results have very simple generalizations to one repeated measures model.
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作者：TAWN, JA
摘要：Bivariate extreme value distributions arise as the limiting distributions of renormalized componentwise maxima. No natural parametric family exists for the dependence between the marginal distributions, but there are considerable restrictions on the dependence structure. We consider modelling the dependence function with parametric models, for which two new models are presented. Tests for independence, and discriminating between models, are also given. The estimation procedure, and the flexibi...
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作者：WEI, LJ
摘要：In comparing two treatments in a clinical trial, the randomized play-the-winner rule tends to assign more study subjects to the better treatment. It is applicable when patients have delayed responses to treatments. It is not deterministic and is less vulnerable to experimental bias than other adaptive designs. In this paper, an efficient algorithm is provided to construct exact permutation tests for testing the equality of the two treatments with the randomized play-the winner rule. The test p...
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作者：DAVIDIAN, M; CARROLL, RJ; SMITH, W
作者单位：Texas A&M University System; Texas A&M University College Station; Eli Lilly; Lilly Research Laboratories; Eli Lilly; Lilly Research Laboratories
摘要：Assay data are often fitted by a nonlinear heteroscedastic regression model with the standard deviation of the response typically taken to be proportional to a power .theta. of the mean. For many assays, how one estimates .theta. does not greatly affect estimates of the mean regression function. Assay analysis also involves estimation of auxiliary calibration constructs such as minimum detectable concentration. An asymptotic theory is developed to show that standard methods for estimating .the...
