the objective was to test the hypothesis that a higher proportion of students with non-Western origin in high school classes is associated with lower and less frequent alcohol consumption among ethnic Danish students.

中文翻译：

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高中非西方裔学生的班级比例会影响丹麦族学生的饮酒习惯吗？

目的是检验一个假设，即高中班级中非西方血统的学生比例较高与丹麦族学生饮酒频率较低和较少有关。