[問題] 一題分配的問題，題目有點看不懂
看板Statistics作者xotis (waiting for you  )時間19年前 (2006/11/23 14:09)推噓0(0推 0噓 0→)留言0則, 0人參與討論串1/2 (看更多)
1.The time T required to repair a machine is an exponentially
distributed random variable with mean 1/2 (hours)
(a)What is the probability that a repair time exceeds 1/2 hour?
1
(b)What is the probability that a repair takes at least 12--- hours
2
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