Suppose the daily number of accidents in Taipei is a Poisson random variable.
On a sunny day,the Poisson parameter is 10. On a rainy day, it is 20.
The fraction of rainy days every year is about 20%. On a certain day exactly
18 accidents have occurred. What it the probability that it was sunny one?
(毋須計算出最後結果,但須計算過程)
請問阿題目說每天意外事故的數量服從波桑分配,但他說晴天的Poisson parameter為10
是指晴天(λ=10)、雨天(λ=20)的意思嗎
另外那個20%是指
e^-20 * 20^x
f(x)=---------------=0.2 的意思嗎?
X!
另外題目又給晴天發生事故18件我要怎麼運用阿
題目最後要求的我也看不太懂
拜託各位高手幫我解答一下吧 拜託
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