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Solucions:<br />
1. Exercici 1:<br />
Partició CP Nombre fulles R 2 TSS RSS SSE (explicada per l'arbre)<br />
0 0.52 1 0 5380227 5380227 0<br />
1 0.14 2 0.52 5380227 2540366 2839861<br />
2 0.05 3 0.66 5380227 1777815 3602412<br />
3 0.013 4 0.72 5380227 1499646 3880581<br />
4 0.01 5 0.73 5380227 1429423 3950804<br />
2. Exercici 3:<br />
(a)<br />
(b) y k = φ ( α k + ∑ 2<br />
h=1 w hkφ ( α h + ∑ 4<br />
i=1 w ihx i<br />
))<br />
(per k=1,2,3 i on φ(x) =<br />
e x<br />
1+e x )<br />
(c) Pr(setosa)=0 ; Pr(versicolor)=0.154 ; Pr(virginica)= 0.846<br />
3
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