[商管] [統計]-東吳93-財務工程與精算數學-指數

看板Grad-ProbAsk作者時間16年前 (2009/11/25 10:54), 編輯推噓2(2推 0噓 3→)
留言5則, 2人參與, 最新討論串1/1
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? 請問這題是要算什麼? 可否賜教，多謝! -- -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.122.140.126
推
11/25 14:40, , 1F
P(Y>2000), Y~Gamma(a=2,入=4000) ..@@應該吧..
11/25 14:40, 1F
→
11/25 14:42, , 2F
上面想錯..= = sorry
11/25 14:42, 2F
推
11/25 23:06, , 3F
P[(X1+X2)/2 > 2000 ] X1,X2~指數(浪打= 2000)
11/25 23:06, 3F
→
11/25 23:08, , 4F
利用可加性可乘性 導出新分配Y~gamma (2,4000)求P Y>4000
11/25 23:08, 4F
→
11/25 23:09, , 5F
2000)
11/25 23:09, 5F
‣ 更多 jackoyu 的文章
文章代碼(AID): #1B39nmbU (Grad-ProbAsk)