标题: GR Math 总结题目疑问 [打印本页] 作者: hytseng 时间: 2002-10-10 23:05 标题: GR Math 总结题目疑问
4、均值為M, 標準方差為D, 落在標準方差內得概率是68%, 問落在M+D範圍內得概率?
【機委】84%
如何得知 84% ?
7、DS:45% the apartments with <=3 people living in each one. What’s the median?
(1)80% of the apartments have <=5
(2)35% of the apartments have >=5
【機委】B
我认为是E,落点范围可能性多作者: tongxun 时间: 2002-10-10 23:14