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LUGO
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High Score Questions 03 Dec 2009, 12:01
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IanStewart
LUGO

Correct! What about Q3, surely this could easily be tested in the GMAT!! I did mine but the questions were very straight forward and got an 800 :-D

And Lugo, the GMAT score you list under your name is impossible; one cannot score higher than a 51 in either section of the test. And since you've posted elsewhere that your score was in the 700s (you said you had a Q46/V41 breakdown), I'm not sure why you list your score as an 800?
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Do not know where you got that info of breakdown - i am curious to see where you saw that
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High Score Questions 03 Dec 2009, 12:31
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jan4dday
let the numbers be a, b, c, d and e.

SD^2 = [(a-15)^2+ (b-15)^2+..... (e-15)^2] / 5 .. right?

this is = (a^2+ b^2+....+e^2) -30(a+b+c+d+e) + 225*5
= 135 -30(75) + 1125
= -990

when divided by 5 we get -198. the square root of which is abt 14


I am usually good at math but somewhere i have gone terribly wrong here. i cant seem to figure it out though
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Thank you for trying this hard question. I noticed my secretary type 15 as the arithmetic but it should have been 3. Your approach is right and you will eventually get down to the right solution.

In general to solve this problems very quickly the key is to remember the following:

n * Var = (Sum of squares) - (2 * Mean * Sum ) + (n * Mean * Mean) - One you have the Var the Stdev can be calculated.

This is not any different to (a+b) * (a+b), also use to construct the correlation and covariance matrix of a distribution. I used lots of this in my PhD.
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High Score Questions 03 Dec 2009, 14:18
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LUGO
IanStewart
LUGO

Correct! What about Q3, surely this could easily be tested in the GMAT!! I did mine but the questions were very straight forward and got an 800 :-D

And Lugo, the GMAT score you list under your name is impossible; one cannot score higher than a 51 in either section of the test. And since you've posted elsewhere that your score was in the 700s (you said you had a Q46/V41 breakdown), I'm not sure why you list your score as an 800?
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Do not know where you got that info of breakdown - I am curious to see where you saw that, just admit it your plain jealous about my score
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High Score Questions 03 Dec 2009, 15:44
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LUGO

Do not know where you got that info of breakdown - I am curious to see where you saw that, just admit it your plain jealous about my score
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I saw this post in another thread:

LUGO

I started filling in the stupid survey (most were there from my previous) when my heart was pounding hard. Because of quant screw up, all I wanted a score above my previous 650. Finally when I clicked score, I saw a 7xx. Though was elated to see the 41 in verbal (92%), was shocked to see 46 in quant. But I am relieved that its over.
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I now realize you were quoting a previous poster, though you hadn't included the text in a quotation block or quotation marks; the post appeared to be your own. Still, a 53 Quant score is simply impossible on the GMAT; scores above 51 have not been possible since the days of the paper tests. And please do not impugn my motivations for pointing out what must be either an error or a fabrication; I have never felt any 'jealousy' whatsoever towards anyone's score on any test, and in general think people should measure their achievement against their own expectations and goals, and not against the performance of others.
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High Score Questions 03 Dec 2009, 15:58
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IanStewart
LUGO

Do not know where you got that info of breakdown - I am curious to see where you saw that, just admit it your plain jealous about my score

I saw this post in another thread:

LUGO

I started filling in the stupid survey (most were there from my previous) when my heart was pounding hard. Because of quant screw up, all I wanted a score above my previous 650. Finally when I clicked score, I saw a 7xx. Though was elated to see the 41 in verbal (92%), was shocked to see 46 in quant. But I am relieved that its over.

I now realize you were quoting a previous poster, though you hadn't included the text in a quotation block or quotation marks; the post appeared to be your own. Still, a 53 Quant score is simply impossible on the GMAT; scores above 51 have not been possible since the days of the paper tests. And please do not impugn my motivations for pointing out what must be either an error or a fabrication; I have never felt any 'jealousy' whatsoever towards anyone's score on any test, and in general think people should measure their achievement against their own expectations and goals, and not against the performance of others.
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How dare you take someone else's post and claim that is mine - People like you should not be teaching GMAT nor be part of this wonderful community where people are looking for help to score high as me in the real GMAT.
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High Score Questions 03 Dec 2009, 16:46
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LUGO

How dare you take someone else's post and claim that is mine - People like you should not be teaching GMAT nor be part of this wonderful community where people are looking for help to score high as me in the real GMAT.
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Lugo, it *was* your post; please look at it. There are no quote marks anywhere. Anyone reading it would think you had written it. And I hardly need to say anything in response to your senseless personal attacks.
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High Score Questions 03 Dec 2009, 17:38
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