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MathGroup Archive 1999

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Re: Help with Percentile formula !!

  • To: mathgroup at smc.vnet.net
  • Subject: [mg19402] Re: Help with Percentile formula !!
  • From: rfinley at netdoor.com (Richard Finley)
  • Date: Mon, 23 Aug 1999 13:57:15 -0400
  • Organization: Internet Doorway, Inc. -- http://www.netdoor.com/
  • References: <7pl8eg$cmr@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Mike,
values of what?  Percentiles have to be with respect to something.  For
example, 50 is 50% of 100 but it is 25% of 200.  In general, to get the
percentile of "a" with respect to "b" you use:
 (a/b)*100%
...so as in the previous example a = 25, b=200 and (a/b)*100% =
(25/200)*100% = 25%
Hope that helps you,   RF


News1 wrote in message <7pl8eg$cmr at smc.vnet.net>...
>Does anyone know the formula to work out percentiles given a list of
values.
>
>Cheers
>
>Mike Brydon
>mike.brydon at risk-reporting.com
>
>
>
>


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