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作者：BROWNE, MW
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作者：GOWER, JC; HARDING, SA
摘要：The classical biplot (Gabriel, 1971) of a multivariate sample X of n units by p variables is generalized for any Euclidean imbeddable metric dij. Sample-units are represented in the usual way by points in an ordination, most conveniently using principal coordinates. Variables are represented by a set of p concurrent nonlinear trajectories whose lengths and dispositions relative to the sample points aid interpretation. When dij2 is defined to have independent contributions from each variable, t...
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作者：MALLER, RA
摘要：A simple sufficient condition for the existence, consistency and asymptotic normality of the regression coefficient in the exponential model for survival is given. The intuition that consistent estimation can only be guaranteed when censoring variables are not too small, depending on the values of the covariates, can be quantified in some examples with the use of this condition.
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作者：CURNOW, RN
作者单位：Australian National University
摘要：The selection of the best variety of a crop to grow in a particular region can be based solely on the yields of the varieties in trials within that region or on the yields of the varieties averaged over trials within the region and trials in a number of similar regions. For a wide range of values of the parameters, the better of these two methods is shown to be almost as effective as selection based on an index combining, in a optimal way, the information from the particular region and from th...
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作者：LEITE, JG; OISHI, J; PEREIRA, CAD
摘要：Using data obtained by the general capture-recapture sequential sampling process, an analytical expression for the maximum likelihood estimate of the population size is introduced. It is shown that the bounded likelihood functions have at most two maxima. For the simple one-to-one case the estimate is unique.
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作者：VERBYLA, AP; VENABLES, WN
摘要：An extension of the growth curve model of Potthoff and Roy (1964) is presented. The extension arises naturally when parallel profiles are required, or profiles are concurrent at some known time point and may be of use for th analysis of longitudinal data from designed experiments. Linearization of a nonlinear model also results in this model. Under certain conditions, transformation of the model leads to seemingly unrelated multivariate regressions. In this case questions of identifiability an...
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作者：LIGGETT, W
摘要：Estimation of the measurement error probability density from data that consist of a few measurmeents on each of several dissimilar items is investigated. An estimator is proposed for independent and identically distributed measurement error with a symmetric density function. This estimator is based on an orthogonal function expansion. Computation begins with the differences between measurements on the same item and makes use of the fact that the characteristic function of these differences equ...
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作者：TOSTESON, TD; TSIATIS, AA
作者单位：Harvard University; Harvard University Medical Affiliates; Dana-Farber Cancer Institute; Harvard Medical School
摘要：In many epidemiological studies, the exposure variable of interest cannot be measured directly. The classical approaches to errors in variables in regression do not extend easily to the nonlinear models commonly used in epidemiological research. Furthermore, the traditional additive measurement error model cannot adequately represent many surrogate relationships. By considering the effect of using surrogate independent variables on the efficient score statistic, some of the difficulties inhere...
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作者：SCHOTT, JR
摘要：One important practical application of principal component analysis is to reduce a large number of variables, say p, to a smaller number, m, by making use of the first m principal components. This technique can easily be extended to two or more groups if the subspaces spanned by the first m principal components are the same for all groups. In this paper we develop an approximate procedure for testing such a hypothesis of common subspaces when two groups are involved. The adequacy of the approx...
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作者：MAK, TK; LI, WK
作者单位：University of Hong Kong
摘要：This paper considers the estimation of the subgroup means of a response variable when the individuals in a random sample are allocated to the subgroups or classes by a fallible device. A double sampling scheme under which we determine also the true classes of the individuals in a subsample is utilized. A simple distributional-free estimator is proposed and the associated large-sample properties are also derived. The proposed estimator is also demonstrated by simulation studies to be more effic...
