《英文msh词典》Sample Sizes
[入口词] Sample Sizes
[主题词] Sample Size
[英文释义] The number of units (persons,animals,patients,specified circumstances,etc.) in a population to be studied. The sample size should be big enough to have a high likelihood of detecting a true difference between two groups. (From Wassertheil-Smoller,Biostatistics and Epidemiology,1990,p95)