68 and 六∑1(r-川） To compute thethe solution to (1)and(2),we start with initial values for a and B,say a(0)and B(0),then update as follows: -）aw ∑=1(ri-p(a),gG) ∑1x(r:-p(a6),3) We iterate until convergence.68 and Jn2(µ, σ2) = ⎡⎣ nσ2 1σ4 ni=1(xi − µ) 1σ4 ni=1(xi − µ) − n2σ4 + 1σ6 ni=1(xi − µ)2 ⎤⎦ To compute the the solution to (1) and (2), we start with initial values for α and β, say α(0) and β(0), then update as follows: ￾
α(j+1) β(j+1) = ￾
α(j) β(j) +{Jn1(α(j), β(j))}−1·￾
ni=1(ri − pi(α(j), β(j)) ni=1 xi(ri − pi(α(j), β(j)) We iterate until convergence.