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作者：GAIL, M; WARE, J
作者单位：National Institutes of Health (NIH) - USA; NIH National Cancer Institute (NCI); National Institutes of Health (NIH) - USA; NIH National Heart Lung & Blood Institute (NHLBI)
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作者：BLUNCK, M; MOMMSEN, TP
摘要：Systematic errors caused by some methods of estimating the parameters of a rectangular hyperbola are discussed using a 2nd-order Taylor expansion. Effects of nontrivial weighting factors, sample size and types of error in the data are analyzed.
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作者：YANG, MCK
摘要：It is often necessary to determine if, and to what extent, an incident A is related to a set of environmental random variables X = (X1,..., Xk)''. In the general population, X is assumed to be normally distributed with mean .mu. and covariance matrix .SIGMA.. A sample of X will be taken from the incident and nonincident groups, and, assuming that the incident rate p is approximately a linear function of X1,..., Xk, the sample sizes for detecting the dependence between A and X can be determined...
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作者：BURNHAM, KP; OVERTON, WS
作者单位：Oregon State University
摘要：A model which allows capture probabilities to vary by individuals is introduced for multiple recapture studies on closed populations. The set of individual capture probabilities is modeled as a random sample from an arbitrary probability distribution over the unit interval. The capture frequencies are a sufficient statistic. A nonparametric estimator of population size is developed based on the generalized jackknife; this estimator is a linear combination of the capture frequencies. Tests of u...
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作者：VENABLE, TC; BHAPKAR, VP
摘要：For the 1-response, 2-factor design with categorical data, Gart (1972) proposed a statistic to test the hypothesis of zero 2nd-order interaction. Unconditionally the statistic approaches .infin. with probability 1 when the interaction effect is 0 and the row and column effects are not 0. Thus the null hypothesis is rejected with probability 1 and the statistic is not valid for the hypothesis, unless certain other special conditions are true. Because the sample size must be extremely large for ...
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作者：SMALL, NJH
摘要：One way of testing data for multivariate normality is to plot the ordered squared radii against their expected values. The approximation to the null distribution offered by the .beta. distribution is a useful improvement on that afforded by the .chi.2 distribution.
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作者：WOOD, CL
摘要：The weak convergence of the sample distribution function based on the estimated residuals in a randomized block design is considered under the null hypothesis of normality of the experimental errors. This result serves as a basis for deriving the limiting distribution of the Kolmogorov-Smirnov statistic computed from the estimated residuals. Quantiles of Monte Carlo simulations of the limiting distributions for various numbers of treatments are given. These results are applicable to the 2-way ...
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作者：WILLIAMS, DA
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作者：GANESALINGAM, S; MCLACHLAN, GJ
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作者：HOLT, JD
摘要：Several models for dependent competing risk data are considered. The effects of certain risk factors or treatments are supposedly of primary interest; such effects are written as regression parameters in a proportional cause-specific hazards model. Techniques based on marginally sufficient statistics and partial likelihood are used for their estimation. Efficiency comparisons are made among estimates based on the suggested models. Special attention is given to the analysis of matched pair data...
