Polynomial Regression Spss. I would like to consider polynomials of degree higher than 3 and or include interactions between independent variables. Can spss fit a curvilinear model or polynomial regression.
The curvefit procedure found under analyze regression curve estimation offers linear quadratic and cubic curves but only for a single variable. The regression model is as follows. Yi a b1xi b2xi2 b3xi3 bkxik ei created by the its training.
To run a polynomial regression model add the new variable agecent2 as shown in figure 4.
Yi a b1xi b2xi2 b3xi3 bkxik ei created by the its training. Please note that a polynomial regression analysis is a sequential analysis. With a quadratic the slope for predicting y from x changes direction once with a cubic it changes direction twice. The curvefit procedure found under analyze regression curve estimation offers linear quadratic and cubic curves but only for a single variable.
