对统计学原理中直方图的探讨——概率密度图解  

Investigation on Histogram in Statistics principle:Explaining Probability Density Function through Diagrams

作　　者：张渝[1] 

机构地区：[1]绵阳师范学院商学院,四川绵阳621000

出　　处：《四川教育学院学报》2009年第11期107-108,111,共3页Journal of Sichuan College of Education

摘　　要：统计资料的整理与显示通常会用到直方图和折线图。文章针对一般直方图的局限,引入频率密度的概念,提出改进的频率密度直方图,进而对折线图进行改进,得到频率密度折线图,以此作为概率密度的图解。Histogram and frequency polygon are always used for sorting out and display of Statistic data. Directed against the limits of common histogram, this paper introduces the concept of frequency density, improves the common histogram by frequency density histogram, goes a step further, and meliorates the frequency polygon by frequency density polygon, which is applied to explaining probability density function.

关 键 词：直方图 频率密度 频率密度折线图 概率密度 

分 类 号：O21[理学—概率论与数理统计]