strongfoam
请问SPSS中的分组回归如何做,如何检验回归系数差异是否显著?
anita_jiu
Data split procedure:
1. click on the 'Data menu'
2. choose 'Split file'
3. click on 'compare groups' and specify your grouping variable (e.g. gender, age etc.)
4. click on 'ok'
Three main steps for regression (if my brain is working properly):
1. Check the assumptions: multicollinearity. Check correlations between dependent and independent variables. There should be some association between the variables, however, it may also be problematic if the correation is too high/low. 'Collinearity diagnostics' needs to be checked as well. The checking of other assumptions is also important, including outliers, independence of residuals and so on.
2. Evaluating the model: Model summary (R² and adjusted R²). Statistical significance of the regression: ANOVA.
3. Assessing each of the independent variables (Coefficients).
Good luck with your analysis.
strongfoam
呵呵,谢谢anita-jiu,回复的好快啊,请问分组回归后如何比较两个回归系数差异是否显著,感谢!
anita_jiu
Compare the tables of ANOVA and model summary between your groups, I think.
anita_jiu
A question for you: which approach of regression are you applying, standard, hierarchical or multiple regression?