title: The repetition principle in scientific research.
abstract: The repetition principle is important in scientific research, because the observational indexes are random variables, which require a certain amount of samples to reveal their changing regularity. The repetition principle stabilizes the mean and the standard variation, so that statistics of the sample can well represent the parameters of the population. Thus, the statistical inference will be reliable. This article discussed the repetition principle from the perspective of common sense and specialty with examples.
authors: Academy of Military Medical Sciences, Beijing, China. lphu812@sina.com
authors: Liang-ping
authors: LP
authors: Hu
authors: Xiao-lei
authors: XL
authors: Bao
authors: Qi
authors: Q
authors: Wang
mesh_terms: D003627:Data Interpretation, Statistical; D015203:Reproducibility of Results; D012107:Research Design; D018401:Sample Size