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Standard Deviation

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by engg.manik » Fri Oct 23, 2009 8:50 am
4. Given the mean of 18 numbers as 'm' and standard Deviation as 's'. If two numbers among 18 numbers are equal to m, then
Col A: Standard Deviation of rest 16 numbers
Col B: s


A:- A>B
B:- A<B
C:- A=B
D:- Cannot Solve
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by 2010gmat » Sat Oct 24, 2009 3:16 am
C

A = B
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Re: Standard Deviation

by sanjana » Sat Oct 24, 2009 8:23 am
engg.manik wrote:4. Given the mean of 18 numbers as 'm' and standard Deviation as 's'. If two numbers among 18 numbers are equal to m, then
Col A: Standard Deviation of rest 16 numbers
Col B: s


A:- A>B
B:- A<B
C:- A=B
D:- Cannot Solve
Is this question posted correctly? Cant seem to understand. Whats Cola and b? is there a table or something?
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Re: Standard Deviation

by Brent@GMATPrepNow » Sat Oct 24, 2009 10:33 am
sanjana wrote:
engg.manik wrote:4. Given the mean of 18 numbers as 'm' and standard Deviation as 's'. If two numbers among 18 numbers are equal to m, then
Col A: Standard Deviation of rest 16 numbers
Col B: s


A:- A>B
B:- A<B
C:- A=B
D:- Cannot Solve
Is this question posted correctly? Cant seem to understand. Whats Cola and b? is there a table or something?
This is a quantitative comparison-type question featured in the GRE. The format isn't found on the GMAT.
Brent Hanneson - Creator of GMATPrepNow.com
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