[no subject]

["C. Spanou" <cs369@cam.ac.uk>]

Hello,
I have a variable that takes the following values 
-1,0,1,2,3,4,5,6,7,8,9,10,12,14,15,18,19,20,25,30,34,35,40,45,50,
100,105,115,130,140,200,215,230,300,400,500.
It is a question from a questionnairre.
I am trying to find for which boundaries a respondent report 5 instead of 4.
Can anyone suggest a model that find those boundaries between the values?
thank you