例2 设有pi_(1),pi_(2)和pi_(3)三个组，欲判别某样品x_(0)属于何组，已知p_(1)=0.05，p_(2)=0.65，p_(3)=0.30，f_(1)(x_(0))=0.10，f_(2)(x_(0))=0.63，f_(3)(x_(0))=2.4.假定误判代价矩阵为 & pi_(1) & pi_(2) & pi_(3) pi_(1) & c(1|1)=0 & c(2|1)=10 & c(3|1)=200 pi_(2) & c(1|2)=20 & c(2|2)=0 & c(3|2)=100 pi_(3) & c(1|3)=60 & c(2|3)=50 & c(3|3)=0对x_(0)进行判别.

例2 设有$\pi_{1},\pi_{2}$和$\pi_{3}$三个组，欲判别某样品$x_{0}$属于何组，已知$p_{1}=0.05$，$p_{2}=0.65$，$p_{3}=0.30$，$f_{1}(x_{0})=0.10$，$f_{2}(x_{0})=0.63$，$f_{3}(x_{0})=2.4$. 假定误判代价矩阵为 $$ \begin{array}{c|ccc} & \pi_{1} & \pi_{2} & \pi_{3} \\ \hline \pi_{1} & c(1|1)=0 & c(2|1)=10 & c(3|1)=200 \\ \pi_{2} & c(1|2)=20 & c(2|2)=0 & c(3|2)=100 \\ \pi_{3} & c(1|3)=60 & c(2|3)=50 & c(3|3)=0 \end{array} $$ 对$x_{0}$进行判别.

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