矩估计的题目,求解答!
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发布时间:2024-01-19 07:54
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热心网友
时间:2024-02-04 18:36
E(x)=0*θ^2+1*2θ(1-θ)+2*(1-θ)^2=2-2θ
X(—)=(0*n1+1*n2+2*n3)/(n1+n2+n3)=(n2+2n3)/(n1+n2+n3)
令E(x)=X(—)求得θ=(2n1+n2)/[2(n1+n2+n3)]
热心网友
时间:2024-02-04 18:36
E(x)=0*θ^2+1*2θ(1-θ)+2*(1-θ)^2=2-2θ
X(上面一横)=(0*n1+1*n2+2*n3)/(n1+n2+n3)=(n2+2n3)/(n1+n2+n3)
令E(x)=X(上面一横)
求得θ=(2n1+n2)/[2(n1+n2+n3)]