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1·The frequency polygon is simpler than its histogram counterpart.

频率多边形比直方图更简单。

2·The relative frequency polygon has the same shape as the frequency polygon made from the same data set but a different scale of values on the vertical axis.

根据同一资料绘制的相对频率多边形与频率多边形的形状是相同的，只是纵轴上的标尺不同。