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September 22nd, 2015, 02:17 AM  #1 
Newbie Joined: Nov 2009 Posts: 16 Thanks: 0  Probability scales (logit, probit etc.)
Hi, Recently I have been pushed into teaching one of the courses in statistics (Categorical data analysis). Since it is not my main field of interests and I have to learn most of the stuff, I would like you to ask you about the usage and application of probability scales. The most popular are logit, probit and Gumbel probability scales (at least this is what I have read). But there is no explication given in which situations it is recommended to use any of these scales and, most of all, why do we scale the data? I would appreciate any help. 
September 22nd, 2015, 02:30 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,395 Thanks: 545 
The main point of scales (from my experience  I am not familiar with these names) is to get a plot which (to the eye) is roughly linear.


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categorical_data, logit, probability, probability_scales, probit, scales 
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