直方图要点精讲

• 作 者: 娄高
• 出 处: 初中生辅导
• 发表日期: 2015年Z4期
• 关键词: 频数分布表 组距 分点 条形图 碳排放 数据分组 克/平方米 组中值 体育考试 体育成绩

一、要点诠释要点一,组距、频数与频数分布表的概念.1.组距:每个小组的两个端点之间的距离(组内数据的取值范围).2.频数:落在各小组内数据的个数.3.频数分布表:把各个类别及其对应的频数用表格的形式表示出来,所得表格就是频数分布表.要点诠释:(1)求频数分布表的一般步骤:1计算最大值与最小值的差;2决定组距和组数;3确定分点;4列频数分布表;

First, the main point of interpretation of points First, the concept of group spacing, frequency and frequency distribution table .1 group distance: the distance between the two endpoints of each group (group data range of values) .2 frequency: The number of data within each group .3 frequency distribution table: the various categories and their corresponding frequency expressed in the form of tables, the resulting table is the frequency distribution table. The main points of interpretation: (1) frequency distribution table of the general steps: 1 Calculate the difference between the maximum value and the minimum value; 2 Determine the group distance and group number; 3 Determine the points; 4 columns frequency distribution table;