1989

最新文章

• EFFICIENT DESIGNS FOR COMPARING TEST TREATMENTS WITH A CONTROL AI翻译
  作者：GUPTA, S
  摘要：The work of Pearce is studied in relation to the recent research on designs for control versus test comparisons. A condition for a nonorthogonal design to be most efficient is given, and a lower bound to the average variance of supplemented contrasts is obtained.
• BOOTSTRAP CHOICE OF THE SMOOTHING PARAMETER IN KERNEL DENSITY-ESTIMATION AI翻译
  作者：TAYLOR, CC
• TESTING ODDS-RATIO EQUALITY FOR SEVERAL DISEASES AI翻译
  作者：WHITTEMORE, AS; HALPERN, J
  摘要：We present a test for the hypothesis that odds-ratios are constant across two or more diseases, using matched case-control data. The test requires less computing than the usual conditional likelihood score test (Prentice, 1979) because it excludes the control covariates. We give a practical algorithm to compute the test statistic and discuss its power.
• A NEW PREDICTIVE PRODUCT ESTIMATOR AI翻译
  作者：AGRAWAL, MC; JAIN, N
  作者单位：University of Delhi
  摘要：A product estimator fo the population mean which is predictive in character is proposed. Although optimal in the sense of unbiasedness and minimum mean squared error under a certain superpopulation model, the estimator is frequently less biased than its competitors under a sampling theoretic approach.
• A MIXTURE MODEL FOR TIME AND AIDS DATA WITH LEFT TRUNCATION AND AN UNCERTAIN ORIGIN AI翻译
  作者：STRUTHERS, CA; FAREWELL, VT
  摘要：The use of a mixture model to estimate the probability of developing AIDS after HIV infection and the distribution of incubation time is investigated. The possibility of left truncation and an uncertain time of infection is incorporated into the analysis. The efficiency losses associated with uncertain infection times are investigated. An example is given.
• EFFICIENCY ROBUST SCORE TESTS FOR RODENT TUMORIGENICITY EXPERIMENTS AI翻译
  作者：BURNETT, R; KREWSKI, D; BLEUER, S
  摘要：The standard statistical test for assessing adverse effects in rodent tumourigenicity experiments is based on a time-adjusted analysis of lethal and incidental tumours. This test is shown to arise as the sum of two score statistics for fatal and incidental lesions respectively, the former optimal against extreme value hazard alternatives and the latter optimal against logistic prevalence alternatives in terms of asymptotic relative efficiency in the Pitman sense. An efficiency robust test is d...
• IS THE IMPROVED LIKELIHOOD RATIO STATISTIC REALLY IMPROVED IN THE DISCRETE CASE AI翻译
  作者：FRYDENBERG, M; JENSEN, JL
• ON CONFIDENCE-REGIONS IN CANONICAL VARIATE ANALYSIS AI翻译
  作者：KRZANOWSKI, WJ
• DISTRIBUTION FREE TESTS FOR STOCHASTIC ORDERING IN THE COMPETING RISKS MODEL AI翻译
  作者：BAGAI, I; DESHPANDE, JV; KOCHAR, SC
  作者单位：Savitribai Phule Pune University; University of Iowa
  摘要：The competing risks set-up is considered where an individual is subject to failure due to two independent competing risks. The available data consist of observed times to failure and the causes of failure. On the basis of this information, distribution-free tests are proposed for testing the equality of the two failure distributions against location, scale and general stochastic ordering alternatives. Locally most powerful rank tests are derived and a generalization of the Wilcoxon test has be...
• A FAMILY OF NONPARAMETRIC STATISTICS FOR COMPARING DIAGNOSTIC MARKERS WITH PAIRED OR UNPAIRED DATA AI翻译
  作者：WIEAND, S; GAIL, MH; JAMES, BR; JAMES, KL
  作者单位：Mayo Clinic; National Institutes of Health (NIH) - USA; NIH National Cancer Institute (NCI)
  摘要：In this paper we study a broad class of nonparametric statistics for comparing two diagnostic markers. One can compare the sensitivities of these diagnostic markers over restricted ranges of specificity by selecting an appropriate statistic from this class. As special cases, one can compare the entire area under the receiver-operator curve (Hanley and McNeil, 1982), or one can compare the sensitivities at a fixed common specificity. Usually we would recommend a comparison based on an average o...