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| source of variance | deviation sum of squares | degrees of freedom | variance | F ratio | significance |
|---|---|---|---|---|---|
| regression | 6.980 × 103 | 42 | 1.661 × 102 | 9.843 | F > F0.01(m,m – n – 1) |
| residual | 3.376 × 102 | 20 | 16.884 | ||
| sum | 7.317 × 103 | 62 |
