一、理解频数分布直方图意义和特点1.将一组数据分成若干个组,属于每组的数据个数叫做这组的频数.即频数是统计出的某一对象出现的次数.2.在相互垂直的两条轴上,把横轴分成若干段,表示组内数据的取值范围,以它为边作一长方形,等距分组时,为画图和看图方便,通常直接用小长方形的高表示频数,这一系列的长方形构成了频数分布直方 First, understand the frequency distribution Histogram meaning and characteristics 1. A set of data is divided into several groups, belonging to each group of data called the frequency of this group. The frequency is the number of statistics of the occurrence of an object. Two perpendicular to each other, the horizontal axis is divided into several sections, indicating the range of data within the group, with it as a side for a rectangle, equidistant grouping, drawing and drawing easy, usually directly with a small rectangle High said the frequency, the series of rectangles constitute a frequency distribution of the bar