The difference , where and are Hinges. It is the same as the Interquartile Rangefor , 9, 13, ... points.
References
Tukey, J. W. Explanatory Data Analysis. Reading, MA: Addison-Wesley, p. 44, 1977.
数学辞典收录了8975条数学词条,基本涵盖了常用数学知识及数学英语单词词组的翻译及用法,是数学学习的有利工具。