Letter to the editor comments on Groparu-Cojocaru and Doray (2013) [0.03%]
致编辑的信：对Groparu-Cojocaru和Doray(2013)的观点
Fadoua Balabdaoui,Saonli Basu
Fadoua Balabdaoui
Although estimating the five parameters of an unknown Generalized Normal Laplace (GNL) density by minimizing the distance between the empirical and true characteristic functions seems appealing, the approach cannot be advocated in practice....
Meta-analysis of Proportions of Rare Events-A Comparison of Exact Likelihood Methods with Robust Variance Estimation [0.03%]
关于罕见事件比例的元分析：精确似然方法与鲁棒方差估计方法的比较
Yan Ma,Haitao Chu,Madhu Mazumdar
Yan Ma
The conventional random effects model for meta-analysis of proportions approximates within-study variation using a normal distribution. Due to potential approximation bias, particularly for the estimation of rare events such as some adverse...
Evaluating the performance of simultaneous stepwise confidence intervals for the difference between two Poisson rates [0.03%]
同时步进法构造两泊松强度差的置信区间性能研究
Brianna C Bright,Julia N Soulakova
Brianna C Bright
We consider the problem of simultaneously estimating Poisson rate differences via applications of the Hsu and Berger stepwise confidence interval method (termed HBM), where comparisons to a common reference group are performed. We discuss c...
Validation of Nonparametric Two-Sample Bootstrap in ROC Analysis on Large Datasets [0.03%]
大型数据集上ROC分析中的非参数两样本Bootstrap法的验证研究
Jin Chu Wu,Alvin F Martin,Raghu N Kacker
Jin Chu Wu
The nonparametric two-sample bootstrap is applied to computing uncertainties of measures in ROC analysis on large datasets in areas such as biometrics, speaker recognition, etc., when the analytical method cannot be used. Its validation was...
Mixed-Effects Models with Skewed Distributions for Time-Varying Decay Rate in HIV Dynamics [0.03%]
具有偏态分布的混合效应模型在HIV动力学中描述时间变化的衰减率问题中的应用
Ren Chen,Yangxin Huang
Ren Chen
After initiation of treatment, HIV viral load has multiphasic changes, which indicates that the viral decay rate is a time-varying process. Mixed-effects models with different time-varying decay rate functions have been proposed in literatu...
An Efficient Operator for the Change Point Estimation in Partial Spline Model [0.03%]
分段样条模型中有效求解变点的算子方法研究
Sung Won Han,Hua Zhong,Mary Putt
Sung Won Han
In bio-informatics application, the estimation of the starting and ending points of drop-down in the longitudinal data is important. One possible approach to estimate such change times is to use the partial spline model with change points. ...
EM Estimation for Finite Mixture Models with Known Mixture Component Size [0.03%]
已知混合成分规模的有限混合模型中的EM估计方法
Chen Teel,Taeyoung Park,Allan R Sampson
Chen Teel
We consider the use of an EM algorithm for fitting finite mixture models when mixture component size is known. This situation can occur in a number of settings, where individual membership is unknown but aggregate membership is known. When ...
Exact Statistical Tests for Heterogeneity of Frequencies Based on Extreme Values [0.03%]
基于极值的频率分布异质性精确统计检验方法研究
Chih-Chieh Wu,Roger C Grimson,Sanjay Shete
Chih-Chieh Wu
Sophisticated statistical analyses of incidence frequencies are often required for various epidemiologic and biomedical applications. Among the most commonly applied methods is Pearson's χ2 test, which is structured to detect non-specific ...
Two-Step Hypothesis Testing When the Number of Variables Exceeds the Sample Size [0.03%]
变量数量超过样本量时的两步假设检验方法
Yueh-Yun Chi,Keith E Muller
Yueh-Yun Chi
Medical images and genetic assays typically generate data with more variables than subjects. Scientists may use a two-step approach for testing hypotheses about Gaussian mean vectors. In the first step, principal components analysis (PCA) s...
A Numerical Method for Estimating the Variance of Age at Maximum Growth Rate in Growth Models [0.03%]
生长模型中估计最大增长率时滞变差的数值方法
Semhar Beyene,V Ramakrishnan
Semhar Beyene
Studies on maturation and body composition mention age at peak height velocity (PHV) as an important measure that could predict adulthood outcome. The age at PHV is often derived from growth models such as the triple logistic fitted to the ...