统计学综述4：样本量计算
Statistics review 4: sample size calculations.
作者信息
Whitley Elise, Ball Jonathan
机构信息
Medical Statistics, University of Bristol, Bristol, UK.
出版信息
Crit Care. 2002 Aug;6(4):335-41. doi: 10.1186/cc1521. Epub 2002 May 10.
Abstract
The present review introduces the notion of statistical power and the hazard of under-powered studies. The problem of how to calculate an ideal sample size is also discussed within the context of factors that affect power, and specific methods for the calculation of sample size are presented for two common scenarios, along with extensions to the simplest case.
摘要
本综述介绍了统计功效的概念以及功效不足研究的危害。在影响功效的因素背景下，还讨论了如何计算理想样本量的问题，并针对两种常见情况给出了计算样本量的具体方法，以及对最简单情况的扩展。
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