From help-request at octave dot org Mon Sep 26 11:22:07 2005
Subject: Re: Determining if samples are normal
From: Przemek Klosowski <przemek at jazz dot ncnr dot nist dot gov>
To: dastew at sympatico dot ca, help@octave.org
Date: Mon, 26 Sep 2005 12:19:50 -0400 (EDT)

   You warp it by the normal curve so that 'normal' data will produce a 
   streight line.

That's very clever, but it's not a very sensitive test: for y=rand(100,1)+rand(100,1)
nt(y) returns 0.996 (this holds even when one uses 10000 points for better stats).
The distribution of rand+rand is triangular, so noone would mistake it for a gaussian.



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