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Analysis of covariance of population density as a function of year (main effect), depth (covariate), and the interaction of depth and year
| Source | DF | Type III SS | Mean square | F | P |
|---|---|---|---|---|---|
| Year | 1 | 0.8666 | 0.8666 | 19.54 | <0.0001 |
| Depth | 1 | 0.5751 | 0.5751 | 12.96 | 0.0007 |
| Depth × year | 1 | 0.5562 | 0.5562 | 12.54 | 0.0009 |
| Error | 50 | 2.2178 | 0.0444 | ||
| Corrected total | 53 | 3.8410 |
DF = degrees of freedom, SS = sums of squares, F = F statistic, P = probability level.
