Xu Manfei, Fralick Drew, Zheng Julia Z, Wang Bokai, Tu Xin M, Feng Changyong
Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Department of Immunology and Microbiology, McGill University, Montreal, QC, Canada.
Shanghai Arch Psychiatry. 2017 Jun 25;29(3):184-188. doi: 10.11919/j.issn.1002-0829.217070.
In clinical research, comparisons of the results from experimental and control groups are often encountered. The two-sample -test (also called independent samples -test) and the paired -test are probably the most widely used tests in statistics for the comparison of mean values between two samples. However, confusion exists with regard to the use of the two test methods, resulting in their inappropriate use. In this paper, we discuss the differences and similarities between these two -tests. Three examples are used to illustrate the calculation procedures of the two-sample -test and paired -test.
在临床研究中，经常会遇到对实验组和对照组结果进行比较的情况。两样本t检验（也称为独立样本t检验）和配对t检验可能是统计学中用于比较两个样本均值最广泛使用的检验方法。然而，在这两种检验方法的使用方面存在混淆，导致它们被不恰当地使用。在本文中，我们讨论这两种t检验之间的差异和相似之处。使用三个例子来说明两样本t检验和配对t检验的计算过程。
