Analysis of Variance2026-11-11anovaancovadummy‑variablesf‑testinteractionspolynomial‑regressionregressionstatisticsmath5806agenticAnalysis of variance as a linear model: dummy coding and its three parameterisations, the between/within sums-of-squares split and the F-test, ANCOVA's adjusted means, nested factors, and interaction and polynomial terms.