【简答题】设随机变量ξ~B(2,p),η~B(3,p),且P(ξ≥1)= 5 9 ,则P(η≥1)=______.
【简答题】distribution channel firms
【单选题】Short distribution channel refers to ( ).
A.
A channel with one or no intermediary.
B.
A channel with two intermediaries.
C.
A channel with two or more intermediaries.
D.
A channel with no intermediaries.
【判断题】设随机变量X~B(2,p),如果E(X)=1,则P{X≥1}=1。()
【简答题】设随机变量ξ~N(1,1),P(ξ>2)=p,则P(0<ξ<1)的值是______
【简答题】distribution channel
【单选题】设随机变量ξ~N(μ,δ 2 ),且 P(ξ<1)= 1 2 ,P(ξ>2)=p ,则P(0<ξ<1)的值为( )
【简答题】设随机变量ξ~B(2,p),η~B(4,p),若P(ξ≥1)= 5 9 ,则P(η≥1)=______.