Oliver Dana, Mahon Suzanne M
Saint Louis University Cancer Center, Missouri, USA.
Clin J Oncol Nurs. 2005 Apr;9(2):238-40. doi: 10.1188/05.CJON.238-240.
Researchers often try to use a randomization technique in an attempt to reduce bias and ensure that treatment and control groups are as similar as possible. This article has provided an overview of how researchers might use parametric and nonparametric statistics when analyzing data and looking for differences between groups. Researchers must consider the types of data and choose the tests that are appropriate for the variable types to draw appropriate conclusions. The next article in this series will address comparison of more than two groups and repeated measures and other design issues.
研究人员经常尝试使用随机化技术，以减少偏差并确保治疗组和对照组尽可能相似。本文概述了研究人员在分析数据并寻找组间差异时如何使用参数统计和非参数统计。研究人员必须考虑数据类型，并选择适合变量类型的检验方法，以得出恰当的结论。本系列的下一篇文章将讨论多于两组的比较、重复测量及其他设计问题。
