Polynomial Regression Spss. Please note that a polynomial regression analysis is a sequential analysis. The regression model is as follows.
With a quadratic the slope for predicting y from x changes direction once with a cubic it changes direction twice. To run a polynomial regression model add the new variable agecent2 as shown in figure 4. Selecting polynomial regression from the analyze menu in spss.
To run a polynomial regression model add the new variable agecent2 as shown in figure 4.
The curvefit procedure found under analyze regression curve estimation offers linear quadratic and cubic curves but only for a single variable. I would like to consider polynomials of degree higher than 3 and or include interactions between independent variables. Selecting polynomial regression from the analyze menu in spss. With a quadratic the slope for predicting y from x changes direction once with a cubic it changes direction twice.
