Z score in disarray already

According to Professor R O Thatil, the Z score on A/L this year (2012) is in disarray already.

He says this is due to the marks obtainable on the question papers with errors found in the examination just over.

According to Mr Thatil this error cannot be rectified by giving marks to the student who avoided the wrong question as well as the student who answered the wrong question.  The Z score will be affected at both these instances he says.

The Professor said that the big difference of marks where the question paper was rectified and where it was not rectified will aggravate the situation.


0 #4 2012-08-20 00:59
According to Prof.Thattil trivial change in marking system would severely affect z score calculation hence university admission in 2012. When one considers the grave injustice done to 2011 GCE A/L repeaters by arranging two z score groups in one merit order list Prof. Thattils allegation is insignificant. If one were to go through previous 10 years result of bio-science stream one would realize that more than 55% medical students were selected from GCE A/L repeaters but Prof. Thattil's formula reduced it to 26% and this has happened in spite of having equal number of students in both groups unlike in previous years when less than 40% repeaters sat for the exam.
0 #3 2012-08-19 23:30
First z score that was released in last December was practically not very unfair by both group of students but it was not so foolproof altogether that supreme court had to annul it. Z score recalculation done separately considering new students and repeaters as two different populations. Having done calculations properly, UGC put both z scores in a single merit order list just like bundling Indian currency notes and sri lankan currency notes together.
0 #2 2012-08-19 18:17
This is a case of not reaching consensus among experts before implementing the formula for the Z-score. If Thattil formula were applied first and the formula of the other expert group applied later, still there will be about 6500 students, different from the present 6500 student, in trouble.
+2 #1 2012-08-19 00:14
This good for nothing prof.Thattil is trying to make a mountain out of a molehill now. He has created the biggest blunder in history of GCE A/L results by mixing 2 different z scores in one merit list against all fundamental rules of mathematics. I consider him as an academic terrorist who jeopardized the future of 6500 talented senior school students. He does not know the practical application of mathematics in day to day life but theoretical just like a person who learnt to swim without getting in to water. He is only an armchair critic.

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