Biometrika

最新文章

• 2-POPULATION SEQUENTIAL TESTS WITH 3 HYPOTHESES AI翻译
  作者：HAYRE, LS
  摘要：A sequential procedure is proposed for choosing 1 of 3 hypotheses concerning the difference between the means of 2 normal populations. Error probabilities are approximately independent of the sampling rule for a wide class of sampling rules, and approximate expressions are derived for these probabilities. A data-dependent sampling rule is given for minimizing any weighted average of the average sample numbers on the 2 populations, with the weights being allowed to depend on the difference betw...
• SEQUENTIAL FORMS OF THE LOG RANK AND MODIFIED WILCOXON TESTS FOR CENSORED DATA AI翻译
  作者：JONES, D; WHITEHEAD, J
  作者单位：University of Reading
  摘要：Sequential procedures for the comparison of 2 groups of survival times are considered. The assumption that the 2 survival curves are members of a Lehmann family, i.e., the proportional hazards model, leads to a sequential version of the log rank test. The alternative assumption of a logistic family leads to a sequential modified Wilcoxon test. Theoretical large-sample properties of both methods are assessed for trials of realistic dimensions by computer simulation.
• DISTRIBUTION-FREE ESTIMATION OF CURE TIME AI翻译
  作者：ONEILL, TJ
  摘要：An individual [human] suffers from several lethal diseases. The cure time is the additional length of life if one of the diseases is eliminated. Some distribution-free estimators of location parameters for cure time are proposed and their asymptotic properties given.
• ESTIMATION OF PARAMETERS FOR AUTOREGRESSIVE-MOVING AVERAGE MODELS FROM SAMPLE AUTOCOVARIANCES AI翻译
  作者：TUAN, PD
  摘要：This paper generalizes the work of Godolphin (1977, 1978) for estimating parameters of the moving average model and of the general autoregressive moving average model by solving the approximate log likelihood equation of Waler (1964).
• MULTIVARIATE LOGISTIC COMPOUNDS AI翻译
  作者：ANDERSON, JA
• ESTIMATION PROCEDURE FOR HOUSEHOLD DISEASE DATA AI翻译
  作者：BECKER, N
  摘要：A procedure is proposed for estimating a parameter of an epidemic model from [measles] household data. The procedure is essentially a method of moments for martingales. It is computationally convenient and is less restrictive in its model assumptions than the maximum likelihood methods previously used. The approach is illustrated and is useful when households contain susceptibles of different types.
• SINGULAR VALUE DECOMPOSITION OF PROBABILITY MATRICES - PROBABILISTIC ASPECTS OF LATENT DICHOTOMOUS VARIABLES AI翻译
  作者：GILULA, Z
• POPULATION ESTIMATION BY THE REMOVAL METHOD ASSUMING PROPORTIONAL TRAPPING AI翻译
  作者：GOOD, IJ; LEWIS, BC; GASKINS, RA; HOWELL, LW
  摘要：Moran (1951) proposed an approximate formula for the likelihood of the size of an animal population when the removal method is used. An exact formula was obtained for the likelihood based on an assumption of proportional trapping of animals. The formula is ill conditioned and requires extremely high precision arithmetic for its numerical evaluation. A form of minimum chi-squared or weighted least-squares method is given for estimating population size. For this method the calculations are not b...
• CONSTRAINED ESTIMATION IN COVARIANCE STRUCTURE-ANALYSIS AI翻译
  作者：LEE, SY
  摘要：In covariance structure analysis, the method of weighted least squares for estimating parameters subject to functional constraints is developed. Statistical properties of the estimator are studied and a goodness-of-fit statistic is presented. Based on the penalty function technique, an algorithm is developed. This algorithm is able to produce the constrained weighted least squares estimator and the constrained maximum likelihood estimator if an appropriate weight matrix is chosen iteratively. ...
• SMALL SAMPLE PROPERTIES OF THE MANTEL-HAENSZEL TEST AI翻译
  作者：LI, SH; SIMON, RM; GART, JJ
  作者单位：National Institutes of Health (NIH) - USA; NIH National Institute of Dental & Craniofacial Research (NIDCR); National Institutes of Health (NIH) - USA; NIH National Cancer Institute (NCI)