作者ba007411 (小强)
看板Math
标题[机统] Hogg&Tanis 8ed 书上的问题
时间Sun Feb 27 19:44:30 2011
课本233页 5.2-13
Let X_1 , X_2 be independent r.v. representing lifetimes (in hours)
of two key components of a device that fails when and only when both
coponents fail. Say each X_i has an exponential distribution with mean
1000. Let Y_1 = min( X_1 , X_2 ) and Y_2 = max( X_1 , X_2 ) , so that
the space of Y_1 and Y_2 is 0 < y_1 < y_2 < 无限大.
(a) Find G( y_1 , y_2 ) = P( Y_1 <= y_1 , Y_2 <= y_2 ).
拜托哪位大大帮个忙解一下
我今天卡关卡了一个下午
很困扰@@
感激不尽!!!!
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