Anyone understand the mathematical logic behind this:
L =(n+1) X (y/100)作者: manasib 时间: 2011-7-13 16:32
I think I may have an idea. The (n+1) is used to indicate the position, and when you have a total of n variables, you have a total of (n+1) intervals. And the y/100 is the percentage indicating the position when the variables are ascending.
So, for example if you have to calculate the position of the 50th percentile of a number of 4 observations, the formula will be: L=5*50/100=2,5. Which is logical when you come to think of it in practice.
I did get this one, though I'm not too good at explaining, sorry.