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作者:MACNEILL, IB
作者单位:Western University (University of Western Ontario)
摘要:Tests were discussed for detecting the presence of common periodicities in the components of a multiple time series. Distributional results were obtained for the case of white noise, independent, normal series. These were extended, first to the case of normal linear series with specified spectra and then to the case of estimated spectra. These results were then discussed in the context of correlated series. The tests were applied to several sets of data.
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作者:KNOKE, JD
作者单位:University System of Ohio; Case Western Reserve University
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作者:AITCHISON, J
作者单位:University of Hong Kong
摘要:A statistical diagnostic system devised for a particular clinic may require appreciable modification when either the method of measurement of any of the diagnostic features changes within the clinic, or the system is applied to another clinic where different methods of measurement are used. In either circumstance, the transfer can be effectively made only on the basis of information from a calibration experiment designed to establish the relationship between the different methods of measuremen...
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作者:OAKES, D
作者单位:Harvard University
摘要:Various procedures are considered for fitting a regression model to censored survival data in continuous time with time-dependent covariate functions. These include maximum likelihood with the underlying hazard function known completely and known up to a multiplicative constant and the maximization of Cox''s partial likelihood. Explicit formulae for the asymptotic variances of the estimators are derived informally and compared. It is shown how sample second derivatives may be used to estimate ...
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作者:SEAL, HL
作者单位:Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne
摘要:Given 2 states A and B such that individuals in state A have mutually exclusive probabilities, possibly dependent on the time spent in state A, of leaving that state because of death, or passage to state B. The probability of an individual passing to state B and dying there within a given period was studied. This problem has been of great interest and importance to actuaries for over 100 yr and the solutions of their professional contemporaries have appeared in their textbooks. Twenty-five yea...
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作者:TITTERINGTON, DM
作者单位:University of Glasgow
摘要:The procedure, due to Aitchison and Aitken (1976), of analyzing multivariate binary data by kernel methods was extended to deal with missing data problems. The performance of the techniques was discussed for univariate, bivariate and for specific multivariate data. Comparisons were drawn with other approaches.
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作者:MCCULLAGH, P
作者单位:University of London; Imperial College London
摘要:Clayton (1974) proposed some simple odds-ratio statistics for comparing 2 independent samples of ordered categorical data. These ideas were extended to a related model for paired data. Two types of estimators were proposed and their efficiency and consistency were investigated. In the special case where there were only 2 categories the model reduces to Cox''s (1958) model for binary paired comparisons.
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作者:GOUGH, KJ
作者单位:Newcastle University - UK
摘要:For many diseases an individual once infected is unable to pass on the disease for what is called the latent period. He then passes into the infectious period, which ends when his symptoms appear and he is removed from circulation. Several attempts to model this situation are described, with emphasis on a model in which the latent period and the infectious period are proportional to .chi.2 variates. The likelihood function is derived for data consisting of interremoval times from households of...
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作者:BROWN, PJ
作者单位:Imperial College London; University of London
摘要:In biology, a sequence of binary or polytomous tests is used to identify the population of origin of a specimen. The sequence is controlled by a diagnostic key which specifies the next test to be applied conditional on the responses to the tests so far performed. Provided that at least some tests are free from error for some of the populations, the tests performed serve to eliminate certain populations from contention. This leads to constructing the key by choosing the most useful next test. H...
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作者:CHAN, NN
作者单位:Chinese University of Hong Kong