statistical diameter的意思|示意

In control group, there is no statistical difference in terms of the mean vessel density and diameter of port wine stain between 8 weeks after and before the first treatment.

对照组第一次治疗前与第一次治疗后8周比较，平均血管密度和平均血管直径无统计学差异。

The correlations between seedling height, diameter at base, main root length, lateral root number and root range were analysed according to statistical principles.

根据统计学原理对一年生苗木苗高、地径、主根长、侧根数、根幅的测量数据进行了相关性分析。