Diapositiva 1
Diapositiva 1
Diapositiva 1
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H 0: variable selective pressure but NO positive selection (M1a)<br />
H 1: variable selective pressure with positive selection (M2a)<br />
Likelihood ratio test (LRT)<br />
2Δl = 2 (l 1-l 0) χ 2 distribution<br />
SE:<br />
• IL MODELLO M2a SI<br />
ADATTA MEGLIO AI DATI<br />
• IL VALORE DI ω STIMATO<br />
E’ >1 PER LA CLASSE DI<br />
SITI p 2<br />
UNA PROPORZIONE<br />
DI SITI PARI A p2 E’<br />
SOTTOPOSTA A<br />
SELEZIONE<br />
POSITIVA
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