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cours et TD - Enseeiht

cours et TD - Enseeiht

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28 CHAPITRE 2. STATISTIQUE DESCRIPTIVE⎛y =⎜⎝y 1.y i.y n⎞ ⎛⎞1 x i1 . . . x ip⎛. . .; X =1 x i1 . . . x ip⎜; β = ⎝⎟ ⎜⎟⎠ ⎝.. . ⎠1 x n1 . . . x npβ 0.β p⎞⎟⎠ <strong>et</strong> r =Par suite l’estimation des paramètres est aussi donné par la résolution du système linéaire des équations normalest XXβ = t Xy⎛⎜⎝r 1.r i.r n⎞⎟⎠

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