What are 5 common statistical methods?

1. Mass Observation Method

2. Statistical Grouping Method

3. Composite Indicator Method

4. Time Series Analysis Method

5. Exponential Analysis Method

Expanded Information:

(1) Mass Observation Method

This is the basic method in the process of statistical activity. This is the basic method for the data collection stage (i.e., the statistical survey stage) of the statistical activity: that is, a sufficiently large number of individuals in the total phenomenon under study are observed and studied with a view to recognizing the regular quantitative characteristics of the total. The mathematical basis of the mass observation method is the law of large numbers, the law of large numbers refers to the fact that although each individual is affected by the influence of different factors of chance and there are several differences in the number.

But for the overall can cancel each other and show a stable regularity, so only for a sufficient number of individuals to observe, the combined results of the observations will tend to stabilize, based on a large number of observations on the basis of the data will give a general conclusion. The various survey methods of statistics belong to the mass observation method.

(2), statistical grouping method

Because of the complexity of the phenomenon under study, the differences and multi-level, we need to study the phenomenon under study for grouping or categorization of the phenomenon, with a view to homogeneous basis to explore the differences between different groups or classes. Statistical grouping occupies an important position in the whole process of statistical activities, in the stage of statistical survey can be used to collect different types of information, and can make the sample survey to improve the representativeness of the sample (i.e., stratified sampling);

In the stage of statistical collation can be used through the statistical grouping of all kinds of data and information to get the processing and storage of different kinds of data and to provide a basis for the compilation of distribution series; in the stage of statistical analysis, it can be used to provide the basis for the compilation of distribution series. In the statistical analysis stage can be divided into types of phenomena through statistical grouping method, the study of the overall internal structure, compare the differences between different classes or groups (significance test) and analyze the correlation between different variables. The statistical grouping methods in statistics include traditional grouping method, discriminant analysis and cluster analysis.

(C) Composite Indicator Method

The quantitative aspects of statistical research phenomena are characterized by statistical composite indicators. The so-called composite indicators, is used to reflect the phenomenon under study from the overall quantitative characteristics and quantitative relationships of the category and its value, the common total indicators, relative indicators, average indicators and sign of variation indicators.

The method of comprehensive indicators occupies a very important position in statistics, especially in socio-economic statistics, and is the core content of descriptive statistics. How to record, describe and reflect the quantitative characteristics and quantitative relationships of the phenomena under study in the most realistic and objective way is a major topic in the theoretical study of statistical indicators.