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# (Un) Scientific analysis of gmatprep

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Director
Joined: 18 Feb 2008
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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05 Jun 2008, 10:33
of course +1 for you is by default.
Senior Manager
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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05 Jun 2008, 10:47
We need someone who has taken the gmatprep so many times, they know almost all the answers.

then they can intentionally get questions wrong, or get questions right, and see what score comes up. No guesswork involved.

anyone?
Senior Manager
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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05 Jun 2008, 10:49
I wouldn't discount SC I got from a 32 to a 40 just by fixing that portion of my test. Remember the algorithm isn't concerned with question type so it expects you to be able to get question correct at certain levels if you are 40+ in both RC and CR (like I was) but you have problem with 35-38 level SC you won't be able to build that score.

Same goes with DS and PS.
Senior Manager
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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05 Jun 2008, 14:31
bsd_lover wrote:
tarmac I am as good as it gets. I've taken the gmatprep about 5 times and my scores range from 770 to 790 on a consistent basis (and no its not because I am actually that good ...)

Oh okay. One suggestion I have though: I think you should either be intentionally getting the answer wrong, or trying to get it right, no need to answer randomly.
Senior Manager
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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05 Jun 2008, 22:34
Hey great experiment. +1.
I have another theory (ignore if this is already included in your premise). The success of first 8-10 questions roughly decides the combinations different bins (say 400 level questions, 500 level questions, 600 etc and not to mention the experimental questions). The algorithm then tests your competence against all such levels (learning as it goes along). Hence the performance across all such is required for a high score. Also, the negatives for relative easier questions will be dearer compared to missing a tough question. I will wait to see your future posts.
SVP
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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05 Jun 2008, 23:07
bsd_lover wrote:
Interesting thoughts. I made a related observation :

The starting verbal questions is somewhat dependent on the Q performance. For instance when I hit Q50, I always see the same boldface CR as the starting question. But now that my Q stats are erratic, the starting questions on V are different.

Support this finding!
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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06 Jun 2008, 06:16
Great! Then it would mean that all questions are equally important and maybe ensure that we don't miss the easy questions and therefore accuracy should be high on easy questions! Time for me to revisit the test taking strategy. Hmmm!
CEO
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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08 Jun 2008, 01:32
Dependence Verbal on Quant score is very interesting....
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Director
Joined: 18 Feb 2008
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Location: Kolkata
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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08 Jun 2008, 04:13
bsd waiting for the Rc strategy....check out what happens when you get all Rc correct...
Director
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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08 Jun 2008, 06:06
another data point for this one....i took a gmatprep yesterday and typically score a 44-45 on quant...but botched two simple problems due to simple calculation errors and ended up with a 43 quant. When I got my verbal section I started with a easy problem. Now when I score a 44-45 quant, I almost always start with the boldface question...very interesting indeed.
Director
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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08 Jun 2008, 09:39
I agree with lsguy..."The scoring doesn't differentiate the question type only the level of the question." after your analysis and others i feel,the best way is dont think much about it and go with the aim of doing well bcos even after getting first few correct you got 47 plus and even you get first five wrong,then also 47 plus.But was surprised with the Rc results.

Moral of the Story:Dont worry much whether boldface or first five or last five etc!
Senior Manager
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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09 Jun 2008, 08:19
I gave my GMATPREP exam and I was horribly timing myself....!!!!!!!!!!!! I had to guess the last 11 questions in quant of which I got 2 right and the remaining wrong... My strike rate in the first 12 questions was 9 (correct and 2 wrong).
I ended up with a score of 45 on Quant. Verbal is a whole different story!!!!!!!!!!!!! (let's not go there)
Senior Manager
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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13 Jun 2008, 07:20
Took the GPrep2 yesterday, I got 39 in verbal after 8 mistakes. I have seen much better scores after 8 wrong but I guess here I had 3 wrong in a row in the first 8.

My take, yes first 5-10 do have more weight!
Intern
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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13 Jun 2008, 08:59
mbawaters wrote:
Took the GPrep2 yesterday, I got 39 in verbal after 8 mistakes. I have seen much better scores after 8 wrong but I guess here I had 3 wrong in a row in the first 8.

My take, yes first 5-10 do have more weight!

I definitely agree. I took the GPrep1 a few nights ago and got a 44 in verbal after missing 7 questions. Only missed one out of the first 8. However, I did miss 3 out of the last 7, so that hurt some. But evidently not as much as missing them at the start hurt you.
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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22 Jun 2008, 07:12
Wow, great analysis bsd!! +1

I guess it all makes sense. Now, I've been told that for RC, the questions are not adaptative. From what I understood, you are given a text with a set of questions based on the level of SC and CR questions you've answered before the RC (this would explain why you never start off with RC).

But then within the RC, the questions do not change. So whether or not you correctly answer your first RC question, the second question will be the same. This is what I've been told and having done PowerPrep 1 and 2 three times, I think it might be true
What do you all think?

If this is true, it would explain why in your experiment, when you answered only the RC questions correctly, you got a worse score than when answering SC or CR alone.

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Re: (Un) Scientific analysis of gmatprep [#permalink]

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24 Aug 2008, 18:28
Awesome posts by bsd_lover and suyashjhawar.
kudos to both

But I think the algorithm in real test must be more complicated than what we see on GMATprep.
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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01 Jul 2009, 21:58
Whoa - just stumbled unto this thread - fantastic job BSD_Lover!
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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02 Jul 2009, 04:49
Kudos, bsd! Great, great, great analysis.

I'm not sure if it's out there - Is the GMATPrep scoring algorithm the same as the real GMAT? Does GMAC, ACT, Pearson VUE, state this explicitly?

Your performance on Quant has no correlation with your 1st Vebal question. I gauged this from GMATPrep - IMO
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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07 Jul 2009, 08:39
great job bsd

+2 for the hard work
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Working on my weakness : GMAT Verbal
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Re: (Un) Scientific analysis of gmatprep [#permalink]

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07 Jul 2009, 22:45

Say if I got lucky and guessed my last 5 questions right in whatever section in the span of 1 minute, would that score be higher if I had taken my time and answered them right in the span of 10 mins?

Thanks,
millhouse
Re: (Un) Scientific analysis of gmatprep   [#permalink] 07 Jul 2009, 22:45

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# (Un) Scientific analysis of gmatprep

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