麻烦各位了~有一小题不太了解~ Calls arriving at a switchboard follow a Poisson process with parameter λ=5.2 per minute. 1.What is the expected waiting time between the arrivals of two calls? 这题我想是把λ=5.2/min转成θ=23.6sec/2calls,算θ? 2.What is the probability that the waiting time between the arrivals of two calls is less than 10 seconds? 这题就把上题θ,用指数分配,然後积分范围0~10? 3.What is the distribution of the time taken for 10 calls to arrive at the switchboard? 他说10calls时间分配分部?不太了解~ 4.What is the expectation of the time taken for 10 calls to arrive at the switchboard? 10calls期望值?不太了解~ 5.What is the probability that less than 5 calls arrive at the switchboard during a 1-minute period? 这题单纯算P(X<5) X=到达calls数 用Poisson? --------------------------------------------------------------------------- 抱歉题目有点多,写的点乱~ 希望各位能不厌其烦帮我解答^^看哪里要修正~或是怎麽解~ 感谢^^ --

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