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Partially correctly answered questions

This topic has 2 expert replies and 4 member replies
Kevinst Junior | Next Rank: 30 Posts Default Avatar
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Partially correctly answered questions

Post Sun Jul 01, 2012 5:16 pm
Hey,

is it public information whether partially correctly answered questions yield any score?
When I take MGMAT CATs I score in a devastating 3-5 range (< 30 percentile).
I answer most of the questions correctly, however sometimes I miss one question in a challenge that consists of several questions.

I wonder if MGMATs IR scale is representative as I usually score in the 90+ percentile on Quant/Verb.
I don't really have much of a problem with the individual questions, either. However, I feel like the timing is way harder than on the Quant/Verb parts.. especially the table analysis always consumes about 4-5 minutes.
I should have just taken the GMAT before the test change...

Kevin

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Deanrobbins1 Newbie | Next Rank: 10 Posts Default Avatar
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Post Mon Jul 02, 2012 3:31 am
How could you possibly get questions "partially" right on a multiple choice test?

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Post Mon Jul 02, 2012 2:17 pm
For a given problem, you must get all of the individual answers correct to receive credit.

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Kevinst Junior | Next Rank: 30 Posts Default Avatar
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Post Mon Jul 02, 2012 10:11 pm
Deanrobbins1 wrote:
How could you possibly get questions "partially" right on a multiple choice test?
IR doesn't only consist of multiple choice questions.
However, there are several problems that consist of several questions... so you can miss some questions while answering others correctly.
Just look at a few examples and you'll understand.

meanjonathan Senior | Next Rank: 100 Posts
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Post Thu Jul 05, 2012 5:00 pm
Kevin,

Quote:
When I take MGMAT CATs I score in a devastating 3-5 range (< 30 percentile)... I feel like the timing is way harder than on the Quant/Verb parts.. especially the table analysis always consumes about 4-5 minutes.
I definitely agree with you. This stuff is really tough. Check out Stacey Koprince's article on GMAC's release of IR percentiles. http://www.beatthegmat.com/mba/2012/06/26/getting-ready-for-integrated-reasoning-the-scoring. The good news is, as with AWA, we won't need great scores, just good enough scores. Apparently that means in the 4-5 range. So only about 50% accuracy.

(And yeah, dude, I'm totally kicking myself for not being on top of this before the change. I totally empathize with you. Something tells me, though, that we'll both do great.) Good luck!!! Smile

-mj.

Kevinst Junior | Next Rank: 30 Posts Default Avatar
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Post Thu Jul 05, 2012 9:53 pm
meanjonathan wrote:
Kevin,

Quote:
When I take MGMAT CATs I score in a devastating 3-5 range (< 30 percentile)... I feel like the timing is way harder than on the Quant/Verb parts.. especially the table analysis always consumes about 4-5 minutes.
I definitely agree with you. This stuff is really tough. Check out Stacey Koprince's article on GMAC's release of IR percentiles. http://www.beatthegmat.com/mba/2012/06/26/getting-ready-for-integrated-reasoning-the-scoring. The good news is, as with AWA, we won't need great scores, just good enough scores. Apparently that means in the 4-5 range. So only about 50% accuracy.

(And yeah, dude, I'm totally kicking myself for not being on top of this before the change. I totally empathize with you. Something tells me, though, that we'll both do great.) Good luck!!! Smile

-mj.
I kind of liked IR, when I first glanced over it. So I thought it wouldn't be too bad to invest a bit more time in a sophisticated preparation. Looks like I was wrong Wink

I'm hoping the MGMAT Percentile calculation is totally off and it won't be too bad when I take the actual exam...

GMAT/MBA Expert

Post Tue Jul 10, 2012 11:53 am
On dichotomous choice IR questions, which are three yes/no or true/false question in a single table, you must get all three correct to get any credit.

This may seem harsh, but it's actually fair--this is a good opportunity to practice some GMAT math!

Since there are two choices each for three questions, there are 2^3=8 possible combinations of right answers. That means a stone-cold guess will be right 1/8 times--that's a little less than half as often as guessing on the quantitive or verbal section.

However, there are 3C2 = 3!/(2!1!) = 3 ways to pick two correct answers and get the third wrong. If partial credit were awarded for partial answers, then there would be 3 + 1 = 4 credited answers out of 8. So, you'd have a 4/8 = 50% chance of getting points on a random guess! This is way too high, and so of course, the testmaker can't credit partial responses.

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