X=N(3,4)
P(1 <X <7)=?
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58 則留言:
X=N(3,4)
變異數=3,標準差=2
P(1 <X <7)
=P(1-3/2 <Z <7-3/2)
=P(-1 <Z <2)
=(68.26%+95.44%)/2
=0.8185
X=N(3,4)
P(1 <X <7)=?
=P([1-3]/2<Z<[7-3]/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1)
=0.9772-0.1587
=0.8185
=P((1-3)/2 < X < (7-3)/2)
=P(-1 < X < 2)
=P(X < 2) - P(X < -1)
=0.9772 - 0.1587
=0.8185
P(1<X<7)
=P((1-3)/2<Z<(7-3)/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1)
=0.9772-0.1587
=0.9185
X = N(3,4)
P(1 < X < 7 ) =
P(-1< Z < 2 ) =
P( Z < 2 ) - P ( Z< -1 ) =
0.9972 - 0.1587 = 0.8385
Ans = 0.8385
ANS:
P(1<x<7)=P[(1-3)/2<x<(7-3)/2]
=P(-1<x<2)
=P(x<2)-P(x<-1)
=0.9772-0.1587
=0.8185
P(1 <X <7)
=p(1-3/2<z<7-3/2)
=p(-1<z<2)
=p(z<2)-p(-1<z)
=0.9772-0.1587
=0.8185
P(1<X<7)=P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1) 查表
=0.9772-0.1587
= 0.8185
μ=3,σ=2
Z=X-μ/σ
P(1P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(-1<Z)
=0.9772-0.1587
=0.8185
X=N(3,4)
P(1 <X <7)=?
=P([1-3]/2<Z<[7-3]/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1)
=0.9772-0.1587
=0.8185
M=3
σ=2
p(1<x<7)
=p(1-3/2<z<7-3/2)
=p(-1<z<2)
=p(z<2)-p(z<-1)
=0.9772-0.1587
=0.8185
M = 3
σ = 2
p(1<x<7)
= p(1-3/2<z<7-3/2)
= p(-1<z<2)
= p(z<2)-p(z<-1)
= 0.9772-0.1587
= 0.8185
ANS:0.8185
P(1<X<7)=P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1) 查表
=0.9772-0.1587
= 0.8185
P(1<X<7)=P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1) 查表
=0.9772-0.1587
= 0.8185
=P([1-3]/2<Z<[7-3]/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1)
=0.9772-0.1587
=0.8185
X=N(3,4)
P(1 <X <7)=?
=P([1-3]/2<Z<[7-3]/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1)
=0.9772-0.1587
=0.8185
X = N(3,4)
P(1 < X < 7 ) =
P(-1< Z < 2 ) =
P( Z < 2 ) - P ( Z< -1 ) =
0.9772 - 0.1587 = 0.8185
Ans = 0.8185
M=3
σ=2
p(1<x<7)
=p(1-3/2<z<7-3/2)
=p(-1<z<2)
=p(z<2)-p(z<-1)
=0.9772-0.1587
=0.8185
p((1-3)/2<x<(7-3)/2)
=p(-1<x<2)
=p(x<2)-p(x<-1)
=0.9772-0.1587
=0.8185
p((1-3)/2<x<(7-3)/2)
=p(-1<x<2)
=p(x<2)-p(x<-1)
=0.9772-0.1587
=0.8185
X=N(3,4)
P(1 <X <7)=?
=P([1-3]/2<Z<[7-3]/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1)
=0.9772-0.1587
=0.8185
X=N(3,4)
P(1 <X <7)=?
=P([1-3]/2<Z<[7-3]/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1)
=0.9772-0.1587
=0.8185
p((1-3)/2<x<(7-3)/2)
=p(-1<x<2)
=p(x<2)-p(x<-1)
=0.9772-0.1587
=0.8185
P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1)
=0.9772-0.1587
= 0.8185
p((1-3)/2<x<(7-3)/2)
=p(-1<x<2)
=p(x<2)-p(x<-1)
=0.9772-0.1587
=0.8185
p((1-3)/2<x<(7-3)/2)
=p(-1<x<2)
=p(x<2)-p(x<-1)
=0.9772-0.1587
=0.8185
p((1-3)/2<x<(7-3)/2)
=p(-1<x<2)
=p(x<2)-p(x<-1)
=0.9772-0.1587
=0.8185
p((1-3)/2<x<(7-3)/2)
=p(-1<x<2)
=p(x<2)-p(x<-1)
=0.9772-0.1587
=0.8185
p((1-3)/2<x<(7-3)/2)
=p(-1<x<2)
=p(x<2)-p(x<-1)
=0.9772-0.1587
=0.8185
p((1-3)/2<x<(7-3)/2)
=p(-1<x<2)
=p(x<2)-p(x<-1)
=0.9772-0.1587
=0.8185
p((1-3)/2<x<(7-3)/2)
=p(-1<x<2)
=p(x<2)-p(x<-1)
=0.9772-0.1587
=0.8185
p((1-3)/2<x<(7-3)/2)
=p(-1<x<2)
=p(x<2)-p(x<-1)
=0.9772-0.1587
=0.8185
p((1-3)/2<x<(7-3)/2)
=p(-1<x<2)
=p(x<2)-p(x<-1)
=0.9772-0.1587
=0.8185
p((1-3)/2<x<(7-3)/2)
= p(-1<x<2)
= p(x<2)-p(x<-1)
= 0.9772-0.1587
= 0.8185
p((1-3)/2<x<(7-3)/2)
=p(-1<x<2)
=p(x<2)-p(x<-1)
=0.9772-0.1587
=0.8185
p((1-3)/2<x<(7-3)/2)
=p(-1<x<2)
=p(x<2)-p(x<-1)
=0.9772-0.1587
=0.8185
P(1<X<7)=P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1) 查表
=0.9772-0.1587
= 0.8185
X=N(3,4)
變異數=3
標準差=2
P(1<x<7)=?
=P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1)
=0.9772-0.1587
=0.8185
X=N(3,4)
變異數=3
標準差=2
P(1<x<7)=?
=P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1)
=0.9772-0.1587
=0.8185
p(1-3/2<z<7-3/2)=p(-1<x<2)
P(x<2)-p(-1<x)=0.9972-0.1587=0.8185
P(1<X<7)
=P((1-3)/2<Z<(7-3)/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1)
=0.9772-0.1587
=0.8185
P(1<X<7)=P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1)
=0.9772-0.1587
= 0.8185
p((1-3)/2<x<(7-3)/2)
=p(-1<x<2)
=p(x<2)-p(x<-1)
=0.9772-0.1587
=0.8185
P(1<X<7)=P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1) 查表
=0.9772-0.1587
= 0.8185
P(1<X<7)=P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1) 查表
=0.9772-0.1587
= 0.8185
P(1<X<7)=P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1) 查表
=0.9772-0.1587
= 0.8185
P(1<X<7)=P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1) 查表
=0.9772-0.1587
= 0.8185
P(1<X<7)=P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1) 查表
=0.9772-0.1587
= 0.8185
P(1<X<7)=P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1) 查表
=0.9772-0.1587
= 0.8185
B9733176 提到...
M=3
σ=2
p(1<x<7)
=p(1-3/2<z<7-3/2)
=p(-1<z<2)
=p(z<2)-p(z<-1)
=0.9772-0.1587
=0.8185
P(1<X<7)=P(1-3/2<Z<7-3/2)
=P(-1<Z<2)
=P(Z<2)-P(Z<-1) 查表去
=0.9772-0.1587
= 0.8185
=P((1-3)/2 < X < (7-3)/2)
=P(-1 < X < 2)
=P(X < 2) - P(X < -1)
=0.9772 - 0.1587
=0.8185
X=N(3,4)
變異數=3,標準差=2
P(1 <X <7)
=P(1-3/2 <Z <7-3/2)
=P(-1 <Z <2)
=(68.26%+95.44%)/2
=0.8185
X=N(3,4)
變異數=3,標準差=2
P(1 <X <7)
=P(1-3/2 <Z <7-3/2)
=P(-1 <Z <2)
=(68.26%+95.44%)/2
=0.8185
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