...同的组,若对各组用同一样的课题(或进 行同样的实验处理),在系统的条件下对他们进行测量,其结果就成为相等组 (equivalent groups) ,则他们的成绩在统计上是相等的。 随机组设计的优缺点 优点:可以控制两组被试者变量的差异,分组的方法简单可行。
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之后，基于血样中维生素d的水平，样本对象被均分为数量相等的五组。
They then grouped all subjects into five equally-sized groups based on their blood levels of vitamin d.
这两组中所列出的字符的数目不必相等。
The number of characters listed in these two groups does not have to be equal.
W3C XML Schema允许一类通常出现在相同位置的元素类型在类型定义中作为一组相等元素处理。
The W3C XML Schema allows for a class of element types that generally appear in the same locations to be treated as a group of equivalent elements in type definitions.
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