zhanghuanle 发表于 2010-3-19 00:25 
请问两个连续变量的比值是连续变量吗?我看温福星老师的一本书上说不是连续变量,值域在0-1,但是很多比率不在0-1之间啊,比值可以是任何数值啊,不懂了,希望得到指教,多谢.
Here is the link it gives level of measuments defined in statistics. It is very useful and need to be fully understand.
http://en.wikipedia.org/wiki/Level_of_measurement