02.05.2013 Views

Pedro Ronalt Vieira - DPI - Inpe

Pedro Ronalt Vieira - DPI - Inpe

Pedro Ronalt Vieira - DPI - Inpe

SHOW MORE
SHOW LESS

Create successful ePaper yourself

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

26<br />

E(X r ) = ¡(n+r=2)<br />

¸ r=2 ¡(n)<br />

2) Esperan»ca (Frery, 1993; Yanasse et al., 1993):<br />

E(X) = ¡(n+1=2)<br />

¸ 1=2 ¡(n)<br />

3) Vari^ancia (Frery, 1993; Yanasse et al., 1993):<br />

Var(X) = 1<br />

0<br />

@n ¡<br />

¸<br />

à ¡(n+1=2)<br />

¡(n)<br />

! 2 1<br />

4) Estimadores pelo Metodo dos Momentos (Frery, 1993; Yanasse et al.,<br />

1993):<br />

a) bnm e obtido pela raiz da equa»c~ao:<br />

0s<br />

1<br />

cm2<br />

@ A<br />

bnm<br />

b) b ¸ m e obtido por:<br />

¡ (bnm+1=2)<br />

¡(bnm)<br />

b¸ m = bnm<br />

cm 2<br />

A<br />

¡ cm1 =0 (3.3)<br />

(3.4)<br />

5) Seonumero equivalente de visadasneconhecido,opar^ametro¸eestimado<br />

pela Equa»c~ao 3.4.

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

Saved successfully!

Ooh no, something went wrong!