Estimation of sample size and testing power (part 5).
Estimation of sample size and testing power is an important component of research design. This article introduced methods for sample size and testing power estimation of difference test for quantitative and qualitative data with the single-group design, the paired design or the crossover design. To be specific, this article introduced formulas for sample size and testing power estimation of difference test for quantitative and qualitative data with the above three designs, the realization based on the formulas and the POWER procedure of SAS software and elaborated it with examples, which will benefit researchers for implementing the repetition principle.
Consulting Center of Biomedical Statistics, Academy of Military Medical Sciences, Beijing 100850, China. lphu812@sina.com
Liang-ping
LP
Hu
Xiao-lei
XL
Bao
Xue
X
Guan
Shi-guo
SG
Zhou
D015233:Models, Statistical; D012107:Research Design; D018401:Sample Size; D012984:Software