Please like the page ' Stop highly erroneous normalization for CBSE JEE Main ranking 2013 ' if u r against this normalization procedure. If u dnt kno wat it is then read below: JEE Ranking is based on two parts: 1.JEE Main marks(60%) 2.Board Marks(40%) The problem lies with the second component.(40% boards- weightage of 144 marks out of 360 total) It lies in the fact that the JEE main written exam has a short head(meaning all of the marks are concentrated in a very small percentilefrom 97 to 100, so students getting a percentile within this range will gain disproportionately large marks - marks drop from 300 for 99.5%ile to 80 for 96.8%ile), and a verylong tail(meaning allstudents ranging from 0 to 97 percentile will be awarded almost the same marks - range of about 0.4*80 = 32 marks). This is not the case in Boards, where there is no such sudden jump, the percentile varies smoothly with marks. However, what CBSE is doing without thought is taking the percentile from Board exams and equating it to the percentiles in the JEEWritten Exams to calculate corresponding marks. This formula came out in May 2013 aftr the conduct of both the exams, so students had no clue that they would be at such a ridiculous disadvantage. Short exmpl showing the blunder: A student scoring 92% in CBSE Boards (getting 96.5%ile willget 0.4*80 = 32 marks out of 144) A student scoring 96% in CBSE Boards (getting 99.6%ile willget around 0.4*300 =120 marks out of 144) A mere differnce of 20 mrks in boards (which should have ideally contributed 0.4*20 = 8 marks difference in final ranking) gets amplified by a factr of 1100% (120-32 = 88), and thousands ofstudents will lose outin the new system.
Posted on: Fri, 05 Jul 2013 04:43:56 +0000
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