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请问这个withits25thpercentileand75thpercentile啥意思?整句是Georgetown’sLSATmedianforitsfull-timeprogramcurrentlyrestsatanimpressive170,withits25thpercentileand75thpercentilebeing167and172respectively

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请问这个with its 25th percentile and 75th percentile 啥意思?整句是Georgetown’s LSAT median for its full-time program currently rests at an impressive 170,with its 25th percentile and 75th percentile being 167 and 172 respectively
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答案和解析
我先整体翻译:
目前,乔治城大学的全日制课程LSAT分数的中位数达到惊人的170分,而第一四分位数(25%)和第三四分位数(75%)的分别是167分和172分.
统计学中,四分位数(Quartile),是指把所有数值由小到大排列并分成四等份,处于三个分割点位置的得分就是四分位数.这三个点就是题中的25%、中位数、75% .
这样你就明白了吧.其实就是种统计方法.