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In a sample of 400 students in a university, 80, or 20%, are Business majors. Based on the above information, the school's paper reported that "20% of all the students at the university are Business majors." This report is an example of( ).


A、a sample;
B、a population;
C、statistical inference;
D、descriptive statistics

发布时间:2025-03-04 17:33:11
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答案:statistical inference
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