Table 1.
Analysis of variance (ANOVA) evaluating the effect of different variables and their interaction on the number of chambers in galls (Levene’s test; 2017: F = 1.19; df = 23, 405; p = 0.25; 2018: F = 1.12; df = 23, 404; p = 0.32).
| Source | Df | FI | p | |
|---|---|---|---|---|
| 2017 | Intercept | 1 | 5135.96 | <0.001 |
| Gall type (Simple, Compound) | 1 | 172.26 | <0.001 | |
| Chestnut field | 2 | 13.55 | <0.001 | |
| Ordinal direction | 3 | 0.89 | 0.45 | |
| Gall type * chestnut field | 2 | 6.30 | 0.02 | |
| 2018 | Intercept | 1 | 3531.15 | <0.001 |
| Gall type (Simple, Compound) | 1 | 119.92 | <0.001 | |
| Chestnut field | 2 | 2.06 | 0.13 | |
| Ordinal direction | 3 | 0.48 | 0.70 | |
| Gall type * chestnut field | 2 | 0.885 | 0.413 |
The asterisk * is in common use to indicate interactions among the variables that it joins.