Groups > comp.lang.java.programmer > #37706

Re: How to identify outliers

From	Robert Klemme <shortcutter@googlemail.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: How to identify outliers
Date	2017-11-30 18:38 +0100
Message-ID	<f8atvrFbc6nU1@mid.individual.net> (permalink)
References	<ovjsgk$91k$1@dont-email.me>

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On 28.11.2017 15:40, Daniele Futtorovic wrote:

> I got a statistical problem, and due to a youth math trauma, I'd like a
> bit of help to solve it.

:-)

> I have a data series. Integer values, but that should be beside the
> point. I want to identify and eliminate "outliers" from this series.
> "Outliers" being values that are "too big" or "too small", in short,
> that are not congruent with the rest of the series. I am well aware that
> saying "outlier" begs the question, hence the quotes, but I can
> fine-tune the degree of outlying for my purposes later on. For the time
> being, I wonder if someone could outline some basic approaches I could
> take in the matter.

Funny: just today I ran across 
https://www.reddit.com/r/java/comments/7gkry0/statistically_rigorous_java_performance_evaluation/ 
and eventually found https://en.wikipedia.org/wiki/Truncated_mean which 
is a fairly simple and straightforward method.  Depending on what you 
want to do you could also work with median or percentiles which are 
usually less affected by outliers than the median.

Kind regards

	robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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Thread

How to identify outliers Daniele Futtorovic <da.futt.news@laposte.net> - 2017-11-28 15:40 +0100
  Re: How to identify outliers Eric Sosman <esosman@comcast-dot-net.invalid> - 2017-11-28 10:13 -0500
    Re: How to identify outliers Daniele Futtorovic <da.futt.news@laposte.net> - 2017-11-28 17:33 +0100
  Re: How to identify outliers Eric Douglas <e.d.programmer@gmail.com> - 2017-11-28 07:28 -0800
    Re: How to identify outliers Daniele Futtorovic <da.futt.news@laposte.net> - 2017-11-28 17:35 +0100
  Re: How to identify outliers Robert Klemme <shortcutter@googlemail.com> - 2017-11-30 18:38 +0100

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