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一、动态数列的概念和种类(一)概念及用途所谓动态,就是现象在时间上的发展变化。如果把反映某种现象在时间上发展变化的一系列统计指标,按时间先后顺序排列,就是动态数列。通过动态数列的编制和分析来反映事物的发展过程和规律性.例如我们把某地几年来流脑按月发病率编制成动态数列,便可以反映该病的变化趋势.动态数列按其指标的性质不同可分为绝对数动态数列,相对数动态数列和平均数动态数列。(二)动态数列的种类1.绝对数动态数列把一系列绝对数,按时间先后顺序排列,用以分析客观现象发展的绝对水平。又分为时期和时点数列两种.(1)时期数列:说明某现象在某一
First, the concept and types of dynamic sequences (a) the concept and use of the so-called dynamic, is the phenomenon of development in time. If a series of statistical indicators reflecting the development of a certain phenomenon in time are arranged chronologically, it is a dynamic sequence. Through the compilation and analysis of dynamic sequences to reflect the development process and the regularity of things. For example, we compiled a dynamic series of monthly epidemic encephalitis for a certain number of years to reflect the trend of changes in the disease. The dynamic array is based on its indicators. The nature can be divided into absolute number dynamic series, relative number dynamic series and average number dynamic series. (B) The type of dynamic series 1. Absolute number dynamic series A series of absolute numbers, arranged in chronological order, to analyze the absolute level of development of objective phenomena. It is divided into two types: time and time series. (1) Time series: indicate that a certain phenomenon is