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Re: st: ksmirnov and normality


From   David Hoaglin <dchoaglin@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: ksmirnov and normality
Date   Fri, 8 Feb 2013 21:06:07 -0500

Quantile-quantile plots are a good way to start.  Real data never
follow a normal distribution, so that questions are whether a normal
distribution is an adequate approximation and how the data depart from
a normal distribution.

David Hoaglin

On Fri, Feb 8, 2013 at 9:05 AM, JVerkuilen (Gmail)
<jvverkuilen@gmail.com> wrote:
> Kolmogorov-Smirnov has such a non-specific alternative hypothesis that
> its power is VERY low. Also, normality testing is often not very
> useful, so I would encourage you to consider whether it's even very
> informative. Plots such as qnorm is often more helpful.
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