If independent variables and dependent variables are to be linearly regressed, whether they are univariate or multivariate, the first step is to draw a scatter plot to see if there is a linear trend, and linear regression is used if there is a linear trend.

Now many people ignore this point and use it directly. As for judging whether the linear equation fits well, look at R-square and spss regression analysis: how to see whether the data can be linear.

The analysis results of SPSS for Windows are clear and intuitive, easy to learn and use, and can directly read EXCEL and DBF data files. Now it has been extended to computers with various operating systems, and it is called the three most influential statistical software in the world together with SAS and BMDP. There is an unwritten rule in international academic circles.

Extended data:

The improvement of 13 version may mainly include the following aspects:

1) Long variable name: In the version of 12, the variable name can be up to 64 characters, but in the version of 13, this restriction may be greatly relaxed to be more compatible with various complex data warehouses today.

2) Improved Autorecode process: This process will be able to use automatic coding templates, so that users can recode variable values in a customized order instead of the default ASCII code order. In addition, the Autorecode process will be able to recode multiple variables at the same time to improve the analysis efficiency.

3) Improved date/time function: This improvement will focus on making it easier to calculate the difference between two dates/times and increase or decrease the value of date variables.

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