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Standard Deviation-GRAPH?

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Director
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Joined: 25 Oct 2008
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Location: Kolkata,India
Standard Deviation-GRAPH?  [#permalink]

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New post 23 Jul 2009, 02:38
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http://en.wikipedia.org/wiki/File:Stand ... iagram.svg

Guys,I purchased the new PR 1012 and came across this concept of standard deviation.I wanted to know if this is tested on the GMAT cos I have'nt come across sums using this concept before.However,the sums in the book are largely based on this.

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Re: Standard Deviation-GRAPH?  [#permalink]

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New post 23 Jul 2009, 07:10
I have never seen a GMAT question asking to calculate the standard deviation.

HOWEVER, I have already saw dozens of GMAT questions that involve the concept of standard deviation. Without understanding what it is, it is not possible to resolve those questions.

Here is an interesting thread.
http://gmatclub.com/forum/standard-devi ... 81018.html

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Re: Standard Deviation-GRAPH? &nbs [#permalink] 23 Jul 2009, 07:10
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