解析:P(-1.81<ξ<0.96=Φ(0.96)-Φ(-1.81)=Φ(0.96)-1+Φ(1.81)=0.796 3,P(0<ξ<2.5=Φ()-Φ()=Φ(0.5)-1+Φ(2)=0.668 7.
答案:0.796 3 0.668 7