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Q is a set of 10 numbers. What is the standard deviation of

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Manager
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Joined: 19 Aug 2007
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Q is a set of 10 numbers. What is the standard deviation of  [#permalink]

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New post 09 Jan 2008, 16:33
Q is a set of 10 numbers. What is the standard deviation of Q if the range of Q is zero?

0
1
5
10
insufficient information

I can think of two situations that meet the above criteria; but the one I chose was wrong...OA to follow, thanks.

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Re: standard deviation and range  [#permalink]

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New post 09 Jan 2008, 16:49
gmat blows wrote:
Q is a set of 10 numbers. What is the standard deviation of Q if the range of Q is zero?

0
1
5
10
insufficient information

I can think of two situations that meet the above criteria; but the one I chose was wrong...OA to follow, thanks.


range 0 means all numbers are same.
SD = 0
Manager
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Re: standard deviation and range  [#permalink]

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New post 09 Jan 2008, 16:55
1
sometimes, I just want to throw my brain across the room...

I was thinking of situations, when the set contains -a and a; i.e {-3, x, x, x, 3}, but of course, range is 6, not zero/

thanks.
VP
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Re: standard deviation and range  [#permalink]

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New post 09 Jan 2008, 17:25
ashkrs wrote:
gmat blows wrote:
Q is a set of 10 numbers. What is the standard deviation of Q if the range of Q is zero?

0
1
5
10
insufficient information

I can think of two situations that meet the above criteria; but the one I chose was wrong...OA to follow, thanks.


range 0 means all numbers are same.
SD = 0

:)

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.


If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
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Re: Q is a set of 10 numbers. What is the standard deviation of  [#permalink]

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New post 02 Dec 2018, 03:27
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Re: Q is a set of 10 numbers. What is the standard deviation of &nbs [#permalink] 02 Dec 2018, 03:27
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