What are the three ways of statistical summary?

They are statistical methods of measurement data, counting data and grade data.

Statistical data is rich and complex, so it is not easy to choose a reasonable statistical analysis method. For the same data, if different statistical analysis methods are chosen to deal with it, sometimes the conclusions are completely different.

The correct choice of statistical methods is based on:

① According to the research purpose, clearly define the types, research factors and levels of experimental design;

② Determine data characteristics (normal distribution, etc.). ) and sample size;

③ Correctly judge the corresponding statistical data types (measurement, counting and grade data), and correctly calculate the statistical values according to the appropriate conditions of statistical methods.