問題詳情
83. An actuary determines that the annual number of tornadoes in counties P and Q are jointly distributed as follows:

Calculate the conditional variance of the annual number of tornadoes in county Q, given that there are no tornadoes in county P.
(A) 0.51
(B) 0.84
(C) 0.88
(D) 0.99
(E) 1.76
參考答案
答案:D
統計:A:0,B:0,C:0,D:0,E:0
難度:計算中