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Converting quant question difficulty to actual score?

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dchan Junior | Next Rank: 30 Posts Default Avatar
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Converting quant question difficulty to actual score?

Post Mon Nov 26, 2012 6:15 pm
Hi. I was wondering if one can estimate his GMAT quant score (0-51) based on the difficulty of the questions he can do correctly (0-800)?

For example I believe MGMAT tells you what difficulty range you are in. E.g The average difficulty of questions you get right in quant is 650. Is there a conversion guide that can tell me what 650 quant difficulty would translate to on a 0-51 scale for math? Do you need to be able to to get 50% of 700-800 level questions right before you can reach Q48+?

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Post Tue Nov 27, 2012 12:43 pm
Hello, dchan. There is not a conversion guide like the one you are looking for. Your score calculations are a bit more complicated than that. Total score is based on raw performance on both the Verbal and Quantitative sections. A range of raw scores will map onto a single scaled score, but since the Total score is based on the raw performance, greater differentiation is possible, meaning the same Quant and Verbal scores can map to different Total scores. It is much like rounding error. Consider scaled scores of 40 for Quant and 35 for Verbal. Say, on the first test, the ‘unrounded’ scores were actually 39.51 and 34.51, and on the second test the ‘unrounded’ scores were 40.49 and 35.49. The difference is only apparent when the scores are combined (sum of 74.02 compared to 75.98). In practice, Total scores up to about 30-40 points apart are considered very similar and should be interpreted as nearly equivalent.

I hope that makes sense.

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