Paired t Test
Published Online: 15 JUL 2005
Copyright © 2005 John Wiley & Sons, Ltd
Encyclopedia of Biostatistics
How to Cite
Hsu, H. and Lachenbruch, P. A. 2005. Paired t Test. Encyclopedia of Biostatistics. 6.
- Published Online: 15 JUL 2005
This is used to compare mean differences between treatments when the observations have been obtained in pairs. The difference between the paired values is assumed to be normally distributed, and the null hypothesis that the expectation is zero is tested by Student's t test. The robustness properties are discussed, as is the asymptotic relative efficiency of nonparametric alternatives.
- degrees of freedom;
- signed rank;
- normal scores