Tests of Model Effects

Table 1. Model: Amount spent = (Intercept) + shopfor + usecoup + shopfor * usecoup
Source	df1	df2	Wald F	Sig.
(Corrected Model)	11.000	3.000	127.231	.001
(Intercept)	1.000	13.000	6321.597	.000
shopfor	2.000	12.000	643.593	.000
usecoup	3.000	11.000	87.453	.000
shopfor*usecoup	6.000	8.000	10.688	.002

Each term in the model, plus the model as a whole, is tested for whether the value of its effect equals 0. Terms with significance values of less than 0.05 have some discernible effect. Thus, all model terms contribute to the model.