... betweenness 中间性 betweenSs design 组间法 betweensubjects design 被试者间设计 被试者间设计 ...
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在小样本研究中，尽管采用了随机法，但两组间偏倚还是很容易发生的。
In studies with small sample sizes, imbalances between the two groups can easily occur despite randomisation .
结果手术切口感染率在动态消毒法中为0.06%，在静态消毒法中为0.48%，两组间差异具有统计学意义（P<0.01）。
Results The wound infection rate was only 0.06% in dynamic group while 0.48% in static group. The parameters showed a significant difference(P<0.01).
美英日三国药典规定使用的大鼠卵巢增重法组内组间变异系数最小，测定结果可靠性最大；
The method measuring the ovary weight of tat for detecting the bioactivity of HCG results lower variation coefficient and greater reliability.
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