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248 CAPITOLO 4. ANALISI E PREVISIONE DI SERIE STORICHE<br />

Call:<br />

ar.ols(x = IT4, order.max = 12)<br />

Coe¢ cients:<br />

1 2 3 4 5 6 7 8<br />

0.1111 0.0989 0.0941 0.1154 0.3582 0.1207 -0.0415 -0.0006<br />

9 10 11 12<br />

-0.0744 -0.0395 -0.0457 0.3892<br />

Intercept: 1799768 (601055)<br />

Order selected 12 sigma^2 estimated as 3.082e+13<br />

var.sp.12

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