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GMat Prep scoring wrong ??

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leilak
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GMat Prep scoring wrong ?? [#permalink] New post   22 Mar 2010, 14:52
The first time I gave a gmatprep test I scored 30 in quant, with 19 incorrcet answers.

Today, I gave the 2nd gmatprep and I scored 49 in quant with 11 incorrect answers.

how is that possible? Moreover, the first time I felt the questions were harder, or at least targeted my absolute weaknesses,

I just hate this test...
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Re: GMat Prep scoring wrong ?? [#permalink] New post   22 Mar 2010, 15:11
hi leilak, many people (trust me, not just you) have the same experience as you did with the scoring on GMATPrep. One thing to take home is that scoring is based on the level of difficulty on your questions, not the number of incorrect/correct questions. Personal feeling towards how a score should be is seldomly right when it comes to estimating GMAT; difficulty of questions are hard to interpret as well. No one has the accurate logarithm to calculate GMAT score other than ETS/GMAC itself. Though it may be hard to believe, trust the score GMATPrep gives you even with 11 incorrect answers because the program uses the most accurate logarithm to calculate your score.
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Re: GMat Prep scoring wrong ?? [#permalink] New post   23 Mar 2010, 13:28
Thanks for taking the time to answer my post :) I supose I will have to trust GMAC and their algorithm...even if it seems abit of a joke to me
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Re: GMat Prep scoring wrong ?? [#permalink] New post   23 Mar 2010, 14:22
Both the level of difficulty and experimental questions should influence the score.
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Re: GMat Prep scoring wrong ?? [#permalink] New post   23 Mar 2010, 20:41
Expert Reply
That's right - number of questions answered wrong does not mean anything; it is even more infuriating when you get a higher score and get more wrong than the last time :)

Welcome to GMAT Club by the way :)
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Re: GMat Prep scoring wrong ?? [#permalink] New post   24 Mar 2010, 03:06
Hi BB,

Dont you think getting experimental questions wrong and others right is a sheer matter of luck?

If person A makes most of the mistakes on exp questions and person B on non-exp, though both of them donot know which are exp,nonpexp question. Also difference in their level is not much. Then A will score more than B..Isnt it? Luck?
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Re: GMat Prep scoring wrong ?? [#permalink] New post   24 Mar 2010, 05:45
Your assertion assumes person A and person B KNOW what questions are exp vs what are scored.

You can not know. There is NO way to know.

gurpreetsingh wrote:
Hi BB,

Dont you think getting experimental questions wrong and others right is a sheer matter of luck?

If person A makes most of the mistakes on exp questions and person B on non-exp, though both of them donot know which are exp,nonpexp question. Also difference in their level is not much. Then A will score more than B..Isnt it? Luck?
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Re: GMat Prep scoring wrong ?? [#permalink] New post   24 Mar 2010, 06:14
No I m not assuming this, just by chance they score same number of correct/incorrects and their level is also almost same. But there will be surely difference in the marks..

So getting questions wrong ONLY on incorrect group is a matter of luck, isnt it?
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Re: GMat Prep scoring wrong ?? [#permalink] New post   24 Mar 2010, 06:29
No, you are assuming so.

We don't know the algorithm in GMATPrep. In the old DOS version (PowerPrep), people figured out what problems were "not scored". In the newer versions, this is unknown.

Someone can miss 40% of the problems and score a 500, while someone else can miss 40% of the problems and score a 720. Luck may play a small role, but when you compound the 20% chance per problem over 37 or 41 problems, luck goes right out the door.

Don't over analyze these things. It's not worth the stress/worry.

gurpreetsingh wrote:
No I m not assuming this, just by chance they score same number of correct/incorrects and their level is also almost same. But there will be surely difference in the marks..

So getting questions wrong ONLY on incorrect group is a matter of luck, isnt it?
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Re: GMat Prep scoring wrong ?? [#permalink] New post   26 Mar 2010, 12:39
The score depends on the no. of difficult questions that you answer correctly and easy questions that you answer incorrectly. In one prep test, I had just 4 questions incorrect in quant, but the score was 47. In another test, 10 questions incorrect, but scored 49 !! This is my experience.

And remember, its calculated as percentile !!!
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Re: GMat Prep scoring wrong ?? [#permalink] New post   12 Apr 2010, 18:47
I've been reading over this thread and wanted to confirm something: since your GMAT score depends on both the number of correct answers and the difficulty level of the questions, does that mean that difficult questions are weighted more heavily?
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Re: GMat Prep scoring wrong ?? [#permalink]
12 Apr 2010, 18:47

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