Fixed Effects

Table 1. Type III tests of fixed effects for random effects model
Source	Numerator df	Denominator df	F	Sig.
Intercept	1	9.136	546.281	.000
PROMO	2	121.406	147.698	.000

The tests of fixed effects table provides F tests for each of the fixed effects specified in the model. Small significance values (that is, less than 0.05) indicate that the effect contributes to the model.

Figure 1. Estimates of fixed effects for random effects model

This table provides estimates of the fixed model effects and tests of their significance. Since there is an intercept term, the third level of PROMO is redundant. Thus, the estimates for the first two levels contrast the effects of the first two promotions to the third. Here, the individual effects of the first two promotions are significantly different from the third. The estimates of the effects suggest that the first promotion is the best, for it is associated with higher sales than either of the other promotions.