Is there evidence suggesting that the IV influenced the outcome?

Estimated Marginal Means group Estimates Dependent Variable: post 95% Confidence Interval group Mean Std. Error Lower Bound Upper Bound Q Traditional 87.436(a) 808 85.732 89.139 1 Weh-based 92.164(a) 808 90.461 93.868 Covariates appearing in the model are evaluated at the following values: pre = 67.50, Pairwise Comparisons .+ Dependent Variable: post 95% Confidence Interval for Mean Difference(a) Difference (J) Group (1-J) Std. Error Sig.fal Upper Bound Lower Bound Q Traditional 1 Web-based -4.729(") 1.143 001 -7.141 -2.317 Web-based Q Traditional 4.729(") 1.143 001 2.317 7.141 Based on estimated marginal means The mean difference is significant at the .05 level. Adjustment for multiple comparisons: Bonferroni. Univariate Tests Dependent Variable: post Sum of Squares df Mean Square F Sia Contrast 111.296 111.296 17.107 001 Error 110,602 17 6.506 The F tests the effect of group. This test is based on the linearly independent pairwise comparisons among the estimated marginal means