Power and precision : a computer program for statistical power analysis and confidence intervals
Power and precision : a computer program for statistical power analysis and confidence intervals
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功效和精度：用于统计功效分析和置信区间的计算机程序
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
Jacob Cohen
中科院分区：
文献类型：
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作者：
M. Borenstein;H. Rothstein;Jacob Cohen
功效和精度是一个独立的程序，用于确定计划研究的样本量。该程序具有异常清晰的界面和许多工具，以帮助用户了解功率分析。它能够创建表格，图表和报告，只需单击一下，它包括许多有助于教学功率分析的功能，以及其他允许研究人员解释和证明资助申请样本大小选择的功能。易于使用，该程序包括一个互动指南，引导用户完成分析所需的每一步，并创建详细的结果报告。该程序允许用户从各种计算选项中进行选择，包括几乎所有程序的精确计算。它具有考虑精度（置信区间宽度）以及统计功效的能力。表格和图表提供了一个直观的画面，可用于探索所有可用的选项，以增加权力。该计划包括模块的手段，比例，相关性，方差/协方差分析，和多元回归。版本2增加了生存分析、逻辑回归和等效性检验模块。该程序附带了一本220页的手册，其中包括对功率分析的全面介绍，以及所有程序的工作示例和算法。交互式工作--修改效应大小、样本大小或alpha的任何元素，并立即查看对功效的影响。* 创建报告--只需单击一下即可创建详细的报告;将此报告复制并粘贴到研究计划或资助申请中。* 创建表格和图表-创建表格和图表来研究每个因素的影响，并将其包含在提案或赠款申请中，以证明样本大小的合理性。
Power and Precision is a stand-alone program that is used to find the sample size for a planned study. This program features an unusually clear interface and many tools to assist the user in developing an understanding of power analysis. Incorporating the ability to create tables, graphs, and reports with a single click, it includes a number of features that are helpful for teaching power analysis, as well as others that allow the researcher to explain and justify the selection of a sample size for grant applications. Easy to use, the program includes an interactive guide that walks the user through every step required for the analysis, and it creates detailed reports of the results. The program allows the user to select from a variety of computational options, including exact computations for virtually all procedures. It features the ability to take account of precision (the confidence interval width), as well as statistical power. Tables and graphs provide an immediate picture that can be used to explore all available options for increasing power. The program includes modules for means, proportions, correlations, analysis of variance/covariance, and multiple regression. Version 2 adds modules for survival analysis, logistic regression, and equivalence testing. The program comes with a 220-page manual that includes a comprehensive introduction to power analysis, as well as worked examples and algorithms for all procedures. Key Features: *Work interactively--modify any element of the effect size, the sample size, or alpha, and immediately see the impact on power. *Create reports--create a detailed report with a single click; copy and paste this report into the study proposal or grant application. *Create tables and graphs--create tables and graphs to study the impact of each factor and include them in the proposal or grant application to justify the sample size.