NORMALIZATION PROCEDURE BASED ON PERCENTILE SCORE BY NTA : JEE MAIN 2019
NTA will be conducting JEE Main 2019 examination on multiple dates, generally in two sessions per day. The candidates will be given different sets of questions per session and it is quite possible that in spite of all efforts of maintaining equivalence among various question papers, the difficulty level of these question papers administered in different sessions may not be exactly the same. Some of the candidates may end up attempting a relatively tougher set of questions when compared to other sets. The candidates who attempt the comparatively tougher examination are likely to get lower marks as compared to those who attempt the easier one. In order to overcome such a situation, “Normalization procedure based on Percentile Score” will be used for ensuring that candidates are neither benefited nor disadvantaged due to the difficulty level of the examination.
The process of Normalization is an established practice for comparing candidate scores across multi session papers and is similar to those being adopted in other large educational selection tests conducted in India. For normalization across sections, NTA shall use the percentile equivalence.
Percentile Scores :
Percentile scores are scores based on the relative performance of all those who appear for the examination. Basically the marks obtained are transformed into a scale ranging from 100 to 0 for each session of examines.
The Percentile Score indicates the percentage of candidates that have scored EQUAL TO OR BELOW (same or lower raw scores) that particular Percentile in that examination. Therefore the topper(highest score) of each session will get the same Percentile of 100 which is desirable. The marks obtained in between the highest and lowest scores are also converted to appropriate Percentiles.
The Percentile score will be the Normalized Score for the examination and shall be used for preparation of the merit lists. The Percentile Scores will be calculated up to 7 decimal places to avoid bunching effect and reduce ties.
The Percentile score of a Candidate is calculated as follows:
= (100 X Number of candidates appeared in the „Session‟ with raw score EQUAL TO OR LESS than the candidate)/ (Total number of the candidates appeared in the ‟Session‟)
Note: The Percentile of the Total shall NOT be an aggregate or average of the Percentile of individual subject.Percentile score is not the same as percentage of marks obtained.
Methods of Resolving Ties :
The overall merit / ranking shall be based on the Percentile scores of the Total Raw Scores. In case of two or more candidates obtaining equal Percentile Scores in the Test, the inter-se merit of such candidates shall be determined in order of preference as follows:
(a) Candidates obtaining higher Percentile Score in Mathematics in the Test.
(b) Candidates obtaining higher Percentile Score in Physics in the Test.
(c) Candidates obtaining higher Percentile Score in Chemistry in the Test.
(d) Candidates older in age to be preferred.
Step-by -Step Procedure For Normalization and Preparation of Merit / Rank List:
Step-1: Distribution of Examines in two days and in two shifts per day
Candidates would be distributed into four sessions randomly so that each session has approximately equal number of candidates. These four sessions would be as follows:
Session-1: Day-1 Shift-1, Session-2: Day-1 Shift-2,
Session-3: Day-2 Shift-1 and Session-4: Day-2 Shift-2
In the event of more number of days or more number of shifts, the candidates will be divided accordingly. his will ensure that there is no bias in the distribution of candidates who shall take the examination. Further, with a large population of examines spread over the entire country the possibility of such bias becomes remote.
Step-2: Preparation of Results for each Session:
The examination results for each session would be prepared in the form of
1. Raw Scores
2. Percentiles Scores separately for each of the three subjects (Mathematics, Physics, Chemistry) and the Total.
The following 4 Percentiles would be calculated for each candidate in the Session:
Let T1,M1, P1, C1 be the raw scores in Total, Mathematics, Physics, Chemistry of a candidate and T1P, M1P, P1P, C1P be the Percentile Scores of Total, Mathematics, Physics, Chemistry of that candidate.
Total Percentile (T1P) = 100 X (No. of candidates appeared from the session with raw score EQUAL TO OR LESS than T1 score / Total No. of candidates appeared in the session)
Mathematics Percentile (M1P): 100 X (No. of candidates appeared from the session with raw score EQUAL TO OR LESS than M1 score in Mathematics / Total No. of candidates appeared in the session)
Physics Percentile (P1P): 100 X (No. of candidates appeared from the session with raw score EQUAL TO OR LESS than P1 score in Physics / Total No. of candidates appeared in the session)
Chemistry Percentile (C1P): 100 X (No. of candidates appeared from the session with raw score EQUAL TO OR LESS than C1 score in Chemistry / Total No. of candidates appeared in the session)
Step-3: Compilation of NTA score and Preparation of Overall Merit/Rank List :
The Percentile scores for the Total Raw Score for all the four sessions (Session-1: Day-1 Shift-1, Session 2: Day-1 Shift-2, Session-3: Day-2 Shift-1 and Session-4: Day-2 Shift-2) as calculated in Step-2 above would be merged and shall be called the NTA scores which will then be used for compilation of result and preparation of overall Merit List / Ranking. The Percentile of all four sessions will be calculated separately for the Total raw score and the raw scores in three subjects (Mathematics, Physics, and Chemistry).
Compilation and display of Result for multi session Papers of JEE (Main) for examinations conducted twice (First and Second attempt) before admissions to the next academic session:
- Compilation of Result for First attempt :
Since, first attempt will be conducted in multi-sessions, NTA scores will be calculated corresponding to the raw marks obtained by a candidate in each session as per above procedure. The calculated NTA scores for all the sessions will be merged for declaration of result. The result shall comprise the four NTA scores for each of the three subjects (Mathematics, Physics, and Chemistry) and the total for the first attempt. - Compilation of Result for Second attempt:
Similarly, second attempt will be conducted in multi-sessions, NTA scores will be calculated corresponding to the raw marks obtained by a candidate in each session as per above procedure. The calculated NTA scores for all the sessions will be merged for declaration of result.The result shall comprise the four NTA scores for each of the three subjects (Mathematics, Physics, and Chemistry) and the total for the second attempt. - Compilation of Result and Preparation of Merit List / Ranking:
The four NTA scores for each of the candidates for the first attempt as well as for the second attempt will be merged for compilation of result and preparation of overall Merit List / Ranking. Those appeared in both the attempts; their best of the two NTA scores will be considered further for preparation of Merit List /Ranking.
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