Peter H Westfall
Peter H Westfall
The incorrect notion that kurtosis somehow measures "peakedness" (flatness, pointiness or modality) of a distribution is remarkably persistent, despite attempts by statisticians to set the record straight. This article puts the notion to re...
Thaddeus Tarpey,R Todd Ogden,Eva Petkova et al.
Thaddeus Tarpey et al.
This paper presents a counterintuitive result regarding the estimation of a regression slope co-efficient. Paradoxically, the precision of the slope estimator can deteriorate when additional information is used to estimate its value. In a r...
Matching for Several Sparse Nominal Variables in a Case-Control Study of Readmission Following Surgery [0.03%]
基于手术后再次入院的病例对照研究中几个稀疏名义变量的匹配
José R Zubizarreta,Caroline E Reinke,Rachel R Kelz et al.
José R Zubizarreta et al.
Matching for several nominal covariates with many levels has usually been thought to be difficult because these covariates combine to form an enormous number of interaction categories with few if any people in most such categories. Moreover...
A Simple Density-Based Empirical Likelihood Ratio Test for Independence [0.03%]
一个简单的基于密度的经验似然比独立性检验
Albert Vexler,Wan-Min Tsai,Alan D Hutson
Albert Vexler
We develop a novel nonparametric likelihood ratio test for independence between two random variables using a technique that is free of the common constraints of defining a given set of specific dependence structures. Our methodology revolve...
Data Acquisition and Preprocessing in Studies on Humans: What Is Not Taught in Statistics Classes? [0.03%]
人类研究中的数据采集与预处理：统计课堂上未教的内容
Yeyi Zhu,Ladia M Hernandez,Peter Mueller et al.
Yeyi Zhu et al.
The aim of this paper is to address issues in research that may be missing from statistics classes and important for (bio-)statistics students. In the context of a case study, we discuss data acquisition and preprocessing steps that fill th...
A Fresh Look at the Discriminant Function Approach for Estimating Crude or Adjusted Odds Ratios [0.03%]
审视判别函数方法在估计粗略或调整优势比中的应用的全新视角
Robert H Lyles,Ying Guo,Andrew N Hill
Robert H Lyles
Assuming a binary outcome, logistic regression is the most common approach to estimating a crude or adjusted odds ratio corresponding to a continuous predictor. We revisit a method termed the discriminant function approach, which leads to c...
A Note on Comparing the Power of Test Statistics at Low Significance Levels [0.03%]
关于在低显著性水平下比较检验统计功效的注记
Nathan Morris,Robert Elston
Nathan Morris
It is an obvious fact that the power of a test statistic is dependent upon the significance (alpha) level at which the test is performed. It is perhaps a less obvious fact that the relative performance of two statistics in terms of power is...
Logistic Regression with Multiple Random Effects: A Simulation Study of Estimation Methods and Statistical Packages [0.03%]
具有多个随机效应的逻辑回归：估计方法及统计软件的模拟研究
Yoonsang Kim,Young-Ku Choi,Sherry Emery
Yoonsang Kim
Several statistical packages are capable of estimating generalized linear mixed models and these packages provide one or more of three estimation methods: penalized quasi-likelihood, Laplace, and Gauss-Hermite. Many studies have investigate...
A Simulation Based Evaluation of the Asymptotic Power Formulae for Cox Models in Small Sample Cases [0.03%]
Cox模型小样本情形下渐近检验功效的模拟研究
Mehmet Kocak,Arzu Onar-Thomas
Mehmet Kocak
Cox proportional hazards (PH) models are commonly used in medical research to investigate the associations between covariates and time to event outcomes. It is frequently noted that with less than ten events per covariate, these models prod...