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Check 800 points

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New post 07 Jul 2017, 11:20
Quick question..

Is the scoring methodology of 800 Score Tests accurate.. I mean its way off from what GMATPrep calculates.. I got a Q49 after 11 Incorrect questions in GMATPrep. and I got a Q43 with the same number of incorrect questions in 800 Score Tests. The incorrect questions were randomly placed and I got only 2 ques incoreect in the first 10 in both the tests. Verbal also generates the results on the same lines..

What's the reason??
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New post 07 Jul 2017, 11:25
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Hey brucebrown ,

Welcome to GMATClub. :)

The best indicator of your scores is official material(GMATPrep Software).

You need to keep in mind that it is not just the number of questions correct/incorrect that determines the final score.

It is the level of difficulty of each question that you get right or wrong.

All the best. :)
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New post 07 Jul 2017, 11:27
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brucebrown wrote:
Quick question..

Is the scoring methodology of 800 Score Tests accurate.. I mean its way off from what GMATPrep calculates.. I got a Q49 after 11 Incorrect questions in GMATPrep. and I got a Q43 with the same number of incorrect questions in 800 Score Tests. The incorrect questions were randomly placed and I got only 2 ques incoreect in the first 10 in both the tests. Verbal also generates the results on the same lines..

What's the reason??


It's hard to say whether 800Score's algorithm is accurate based on those test results.

Even the official scoring algorithm isn't as predictable as one might think.
Consider this experiment I performed: I took GMATPrep Practice Test #1 four times, and each time I answered every second question correctly (I did this for the quant section only)

Given that I correctly answered exactly half of the questions each time, you'd expect my quant scores to be roughly the same for all 4 tests.

My 4 scaled scores were: 19, 23, 26 and 42

This represents a percentile range from approximately 8th percentile to the 63rd percentile.

Given these results, what can we say for certain about the official scoring algorithm?

Cheers,
Brent
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New post 07 Jul 2017, 11:42
I don't comment on specific company materials, but you really shouldn't trust the scores you get from any company tests - use GMATPrep if you need a realistic score estimate. No company test could possibly be as accurate as the real thing (and that's what GMATPrep is), and some company tests are very, very far off.

As Brent's experiment proves, your number of right answers doesn't strictly determine your score, nor does the position in the test of your right and wrong answers. What matters is the difficulty level of the questions you got right and wrong. And difficulty level isn't perfectly predictable - even at the start of the test, some tests start harder than others.
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New post 07 Jul 2017, 23:06
brucebrown wrote:
Quick question..

Is the scoring methodology of 800 Score Tests accurate.. I mean its way off from what GMATPrep calculates.. I got a Q49 after 11 Incorrect questions in GMATPrep. and I got a Q43 with the same number of incorrect questions in 800 Score Tests. The incorrect questions were randomly placed and I got only 2 ques incoreect in the first 10 in both the tests. Verbal also generates the results on the same lines..

What's the reason??
Don't focus on the number of questions you got right/wrong on the GMATPrep, and don't worry too much about the scores you get on non-official tests.
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Re: Check 800 points   [#permalink] 07 Jul 2017, 23:06
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