1. The quartile is a statistical measure used to divide a data set into four equal parts.
四分位数是用于将数据集分为四个等份的统计量。
2. The lower quartile represents the 25th percentile of a data set, while the upper quartile represents the 75th percentile.
下四分位数代表数据集的25百分位数，而上四分位数代表数据集的75百分位数。