A Level AP statistics histogram 直方图 词汇拆解与释义 Histogram 用相邻矩形表示 grouped continuous data。 S1 核心 Histogram 的面积代表 frequency，而高度代表 frequency density。 frequency density=frequencyclass width\text{frequency density}=\frac{\text{frequency}}{\text{class width}}frequency density=class widthfrequency
