麻煩各位了~有一小題不太了解~ 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? 這題我想是把λ=5.2/min轉成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? 這題就把上題θ,用指數分配,然後積分範圍0~10? 3.What is the distribution of the time taken for 10 calls to arrive at the switchboard? 他說10calls時間分配分部?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? 這題單純算P(X<5) X=到達calls數 用Poisson? --------------------------------------------------------------------------- 抱歉題目有點多,寫的點亂~ 希望各位能不厭其煩幫我解答^^看哪裡要修正~或是怎麼解~ 感謝^^ --

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