Table 2. Results from an analysis of covariance (ANCOVA) demonstrating how neighborhood age co-varies with neighborhood management (i.e., neighborhoods with and without a HOA) in explaining native bird diversity in Phoenix, Arizona. The insignificance of the interaction term indicates the homogeneity of the slopes was not rejected.

Variable n F ratio P
Neighborhood management 39 4.94 0.03
Neighborhood age 39 0.26 0.62
Interaction 39 0.28 0.60