NO.PZ2015120604000096 问题如下 A funmanager fin ththe return of fun in the market are normally stributehaving a meof $170,000 ana stanrviation of $25,000. The percent of sto incomes greater th$245,000 is closest to: A.0.50%. B.2.28%. C.0.13%. C is correct.Z=(245000 - 170000)/25000=F(3)1 - F(3) = 1 - 0.9987 = 0.0013. 这题没给F3 考试一般都会有的吧,除了4个特殊值
NO.PZ2015120604000096 2.28%. 0.13%. C is correct. Z=(245000 - 170000)/25000=F(3) 1 - F(3) = 1 - 0.9987 = 0.0013.什么时候要用标准化来做题呢 比如z和t检验。看到哪个信号能知道用标准化检验呢
NO.PZ2015120604000096 老师能给一下完整版的查询表吗?thx
完全不知道为什么这么算了,不是已经是正态分布了么,怎么还需要转换?F(3)代表什么?
2.28%. 0.13%. C is correct. Z=(245000 - 170000)/25000=F(3) 1 - F(3) = 1 - 0.9987 = 0.0013.为什么1.65,1.96,2.58这些数可以用作是Z带入算题目呢?这些数不是代表落在这些数的倍数的标准差内吗?