作者darkstar0412 (爱猫成痴^^)
看板Grad-ProbAsk
标题[问题] 两题统计
时间Thu Mar 19 00:08:35 2009
1.for members in a penson plan,the transition matrix of probabilities of
switching funds is
[ 0.65 0.35 ]
P=| 0.25 0.75 ]
0 1 2
if initial probability distribution is P =[0.5 0.5] , find(a)P (b)P
2.T为指数分配，P[T≦2]=2‧P[T>4]，试问Var[T]为？
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※ 编辑: darkstar0412 来自: 220.131.1.238 (03/23 03:34)