1.Let X be the damage incurred (in$) in a certain type of accident during a given year. Possible X value are 0,1000,5000 and 10000 with possibilities 0.8,0.2 0.08,and 0.02,respectively. A particular company offers a $500 deductible(减免) policy. If the company wishes its expected profit to be $100, what premium amount should it charge? A)700 B)800 C)1200 D)1300 这题是决策分析的东西吗??? 题目所说的减免500元政策 是直接扣possible X value吗??? 这样应该要怎麽算呢?? 2. Determine a value of c such that in a problem of simple linear n regression, the statistic cΣ(Yi-β1-β2X1)^2 will be an unbiased i=1 estimator of sigma^2 (打不出那图案Orz) 这题应该怎麽证呢??? 我证不出来>"< 可以稍微提示我一下就好 後续计算 自己来就好Orz 谢谢大家的帮忙^^ --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 203.73.17.148 ※ 编辑: liliya 来自: 203.73.17.148 (03/03 23:15)