科学研究所获得的数据,可以分为计量和计数两大类。一般而言,凡是用度、量、衡等量具量测的数据,称之为计量数据,或称数量资料;凡是通过计数个体数目而表示的资料,称为计数资料,或称为次数资料。资料类别不同,统计分析方法也不相同。前面几讲就是谈的计量资料的统计分析方法,本讲将介绍计数资料的统计方法——卡平方 Data obtained by scientific research, can be divided into two categories of measurement and counting. In general, any data measured by measuring, measuring, weighing and other measuring instruments are called measurement data or quantitative data. Any data expressed by counting the number of individuals is called count data or count data. Different types of data, statistical analysis methods are not the same. In front of a few talks is about the statistical analysis of measurement data, this will introduce the statistical methods of counting data - the square of the card