We have a representative sample.
我们有一性的样品。
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A recent study of a nationally representative sample of American students found that black students with the same standardized test scores as their white classmates were less likely to be nominated for gifted programs if they had a non-black teacher.
最近对有全国代表性
美国学生
进行
一项研究发现,如果黑人学生
老师不是黑人, 那么与白人同学
有相同标准化考试成绩
黑人学生被提名参加天才项目
可能性较小。