作者jackoyu (伟下列资料正确填写并回숩
看板Grad-ProbAsk
标题[商管] [统计]-东吴93-财务工程与精算数学-指数
时间Wed Nov 25 10:54:38 2009
An insurance company sells an auto insurance policy. The claim size is an
exponential random variable with mean two thousand dollars.
a) What is the probability that the average of two claims is over two
thousand dollars?
请问这题是要算什麽? 可否赐教，多谢!
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◆ From: 140.122.140.126
1F：推 solaarr:P(Y>2000), Y~Gamma(a=2,入=4000) ..@@应该吧.. 11/25 14:40
2F：→ solaarr:上面想错..= = sorry 11/25 14:42
3F：推 ksherry:P[(X1+X2)/2 > 2000 ] X1,X2~指数(浪打= 2000) 11/25 23:06
4F：→ ksherry:利用可加性可乘性 导出新分配Y~gamma (2,4000)求P Y>4000 11/25 23:08
5F：→ ksherry: 2000) 11/25 23:09