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Standard Deviation-GRAPH?

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by uptowngirl92 » Thu Jul 23, 2009 1:38 am
https://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?

by Stuart@KaplanGMAT » Thu Jul 23, 2009 1:04 pm
uptowngirl92 wrote:https://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.
I have never seen a GMAT SD question that required knowledge of that graph.

Here's an example of what's currently the most common style of SD question on the GMAT:
The mean test score in a class is 65. If the scores have a standard deviation of 6, which of the following is between 1 and 2 standard deviations from the mean?

a) 51
b) 55
c) 60
d) 68
e) 79
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Re: Standard Deviation-GRAPH?

by shibal » Thu Jul 23, 2009 3:57 pm
Stuart Kovinsky wrote:
uptowngirl92 wrote:https://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.
I have never seen a GMAT SD question that required knowledge of that graph.

Here's an example of what's currently the most common style of SD question on the GMAT:
The mean test score in a class is 65. If the scores have a standard deviation of 6, which of the following is between 1 and 2 standard deviations from the mean?

a) 51
b) 55
c) 60
d) 68
e) 79
Stuart, thanks for the great example of SD... would be the answer B?
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Re: Standard Deviation-GRAPH?

by Stuart@KaplanGMAT » Thu Jul 23, 2009 5:58 pm
shibal wrote:
Stuart Kovinsky wrote:
uptowngirl92 wrote:https://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.
I have never seen a GMAT SD question that required knowledge of that graph.

Here's an example of what's currently the most common style of SD question on the GMAT:
The mean test score in a class is 65. If the scores have a standard deviation of 6, which of the following is between 1 and 2 standard deviations from the mean?

a) 51
b) 55
c) 60
d) 68
e) 79
Stuart, thanks for the great example of SD... would be the answer B?
Yes indeed!
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BTG100 for $100 off a full course
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Re: Standard Deviation-GRAPH?

by sreak1089 » Fri Jul 24, 2009 3:30 am
Sentence Correction:
You should haved asked:

Would the answer be B? below.

Just kidding just for fun :)
shibal wrote:
Stuart Kovinsky wrote:
uptowngirl92 wrote:https://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.
I have never seen a GMAT SD question that required knowledge of that graph.

Here's an example of what's currently the most common style of SD question on the GMAT:
The mean test score in a class is 65. If the scores have a standard deviation of 6, which of the following is between 1 and 2 standard deviations from the mean?

a) 51
b) 55
c) 60
d) 68
e) 79
Stuart, thanks for the great example of SD... would be the answer B?
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by panacea6565 » Sun Jul 26, 2009 8:50 pm
hey

can anyone explain me the Q and answer ,,, i m not able to get either
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