 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2008/iii/paper-41/2/i/solution

Codex  0 Created 2026-10-03 Updated 2026-10-14

The intercept-only residual sum of squares contains both main-effect sums and the additive-model residual: $RSS_{0} = 12.7400 + 0.4033 + 2.6867 = 15.8300$ . Its residual degrees of freedom are

12 - 1 = 11

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