已知X~N(1,σ^2),P(-1
已知X~N(1, σ^2),P(-1<X<3)=0.7,求P(X<-1),要详细过程,感谢!!
μ = 1,则 P(X<-1) = P(X>3);
P(-1< X< 3) = P(X<3) - P(X<-1)
= P(X<3) - P(X>3)
= 1 - P(X>3) - P(X>3)
= 1 - 2P(X>3) = 0.7;
P(X<-1) = P(X>3) = ( 1 - 0.7 )/2 = 0.15 。
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已知X~N(1, σ^2),P(-1<X<3)=0.7,求P(X<-1),要详细过程,感谢!!
μ = 1,则 P(X<-1) = P(X>3);
P(-1< X< 3) = P(X<3) - P(X<-1)
= P(X<3) - P(X>3)
= 1 - P(X>3) - P(X>3)
= 1 - 2P(X>3) = 0.7;
P(X<-1) = P(X>3) = ( 1 - 0.7 )/2 = 0.15 。