Allison: Columbia University College of Physicians and Surgeons; B.S. Gorman: Hofstra University.AllisonDavidB.GormanBernardS.EBSCO_AspEducational & Psychological MeasurementAllison DB, Gorman BS. POWCOR: A power analysis and sample size program for testing differences between dependent and independent ...
QUANTO 1.1: A computer program for power and sample size calculations for genetic-epidemiology studies Methods of sample size and power calculations are reviewed for the most common study designs. The sample size and power equations for these designs are sho... W Gauderman,J Morrison 被引量: ...
power and sample size calculations a review and computer program Multivariate techniques of O'Brien's OLS and GLS statistics are discussed in the context of their application in clinical trials. We introduce the concept of an operational effect size and illustrate its use to evaluate power. An ex...
The sample size and power equations for these designs are shown to be special cases of two generic formulae for sample size and power calculations. A computer program is available that can be used for studies with dichotomous, continuous, or survival response measures. The alternative hypotheses ...
用R语言的SKAT包中Power_Logistic(计算power)/ Get_RequiredSampleSize(计算样本量)函数进行分析,该函数功能如下:Compute an average power of SKAT and SKAT-O for testing association between a genomic region and dichotomous phenotypes from case-control studies with a given disease model.匹配流程gene-based关...
Power and sample-size analysis Power and sample-size (PSS) analysis is a key component in designing a statistical study. It investigates the optimal allocation of study resources to increase the likelihood of the successful achievement of a study objective. How many subjects do we need in a ...
Power and Sample Size Calculation By Gayla Olbricht and Yong Wang Definition and Application Statistical power is defined as the probability of rejecting the null hypothesis while the alternative hypothesis is true. Factors that affect statistical power include the sample size, the specification of ...
Calculate the sample size for a planned study. Software for statistical power analysis. Create reports, tables, graphs. Free trial download.
The procedure in which power and sample size are calculated is specified in the following text. In SAS, statistical power and sample size calculation can be done either through program editor orby clicking the menuthe menu. In the latter, a set of code is automatically generated every time a...
An R program for sample-size estimation is provided in Suppelementary File S1. RESULTS Simulation Study The primary objective of simulation studies is to evaluate the performance of the derived power functions with log-normal-distributed data and normal-distributed data. The secondary objective is...