Wednesday, 18 July 2012

EQE Paper D - statistics

For all 1440 candidates [including 124 who scored 0]
- Average: 39.5
- Minimum: 0
- Maximum: 83
- Number with 44 or less: 813 [56.5%]
- Number with 45 & higher: 627 [43.5%]
- Number with 50 and higher: 472 [33%]

















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We assume that most of those with 0 are candidates who did not turn up.

So, for the 1316 candidates who scored more than 0
- Average: 43.5
- Minimum:5
- Maximum: 83
- Number with 5 to 44: 689 [52.4%]

- Number with 45 & higher: 627 [47.6%]
- Number with 50 and higher: 472 [36%]


5 comments:

  1. One should explain me why they can always (i.e. each year) have a kind of Gaussian curve around 40-50 marks

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  2. Because with large numbers of candidates, most statistical processes tend to a Gaussian (see the Central Limit Theorem), while the papers are similar as between years, as is the mode of preparation of the students?

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  3. I find strange how the centre of the Gaussian is always just below 50%.
    But even stranger is the dip in 45-49! Either it is a statistical fluke, or grades 45-49 are being reviewed...

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  4. If that were the case, you should be able to see whether "missing" 45-49 papers have been added to the Gaussian bins either side. It's usually easy to tell whether someone's been massaging the raw data. Pete - can you subtract your gaussian from the bins, so we can see whether there is a "regrade" effect?

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  5. Actually, I should hope that certain grades, let's say 40 to 50 are checked more carefully than other grades, considering the huge importance.

    So I don't find it strange, it confirms what I would find normal

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