论文部分内容阅读
在前面的几册书中,我们学习了用条形统计图、折线统计图、扇形统计图来清晰地表示数据,有时对于数据比较多时,为了更好地刻画数据的分布情况和总体规律,还要用到频数分布直方图和频数折线图.频数分布直方图本质上是一种条形统计图,条形统计图具有两个指标,一个是横向指标(相当于横坐标、自变量),反映考察对象的类别;另一个是纵向指标(相当于纵坐标、因变量),反映该类别考察对象的数量特征,从这个意义上讲,频数分布直方图是一种以频数为纵向指标的条形统计图,下面以实例详细介绍绘制频数分布直方图的一般步骤.例在上学期数学期末测试中,江阳中
In the previous books, we learned to use bar charts, line charts, and fan charts to clearly represent data. Sometimes, when the data is relatively large, in order to better describe the distribution of the data and the overall laws, Frequency distribution histogram and frequency line chart are used. The frequency distribution histogram is essentially a bar chart. The bar chart has two indicators. One is the horizontal indicator (equivalent to abscissa and independent variable). Observing the category of the object; the other is the vertical index (equivalent to the ordinate, dependent variable), reflecting the quantitative characteristics of the object under examination in this category. In this sense, the frequency distribution histogram is a bar with frequency as the vertical indicator. In the statistical diagram, the following describes the general steps of plotting frequency distribution histograms with examples. In the last semester of mathematics tests, Jiang Yangzhong