17.06.2013 Views

Regressione lineare semplice: inferenza - Economia

Regressione lineare semplice: inferenza - Economia

Regressione lineare semplice: inferenza - Economia

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Teorema di Gauss-Markov<br />

Distribuzione della statistica t<br />

La statistica t per verificare l’ipotesi nulla β1 = β1,0 è<br />

t = ˆ β1 − β1,0<br />

SE( ˆ β1)<br />

Sostituendo la formula per SE( ˆ β1)<br />

<br />

SE( ˆ β1) ≡ ˆσ ˆ β1 =<br />

s 2 u<br />

n<br />

i=1 (Xi − ¯ X) 2<br />

Rossi <strong>Regressione</strong> <strong>lineare</strong> <strong>semplice</strong> Econometria - 2013 55 / 60

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!