問題詳情
20 假設 x 是指數分配（exponential distribution），其機率密度函數為 
，若 E(x)u, P(x>u)=q ，則 q 的範圍為何？
(A) 1/2<q <
(B) 1/3 <q< 1/2
(C) 1/4< q < 1/3
(D)1/5< q <1/4
，若 E(x)u, P(x>u)=q ，則 q 的範圍為何？(A) 1/2<q <
(B) 1/3 <q< 1/2
(C) 1/4< q < 1/3
(D)1/5< q <1/4
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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