NTA JEE mains-2019 : Normalization procedure of NTA scores for multi session Papers

The compilation of the NTA JEE mains Score, NTA has declared the following Normalization procedure based on PERCENTILES SCORE .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 benefitted nor disadvantaged due to the difficulty level of the examination. The Normalization Procedure, set out below shall be adopted, for compiling the NTA scores for multi session papers. 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 examinees.

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 (instead of the raw marks of the candidate ) 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.

Example: Suppose a test was held in 4 sessions of examinees as per details given below:-(Allocation of Days and shifts were done randomly)

(a) Distribution of candidates were as follows:

Session-1:Day-1 Shift-1 Session-2:Day-1Shift-2,

Session-3: Day- 2 Shift - 1and Session - 4: Day-2 Shift-2

In this method of scoring the HIGHEST RAW SCORE in each paper (irrespective of the raw scores) will be the 100 Percentile indicating that 100% of candidates have scores equal to or lesser than the highest scorer/ topper for that session.

Highest Raw Score and Percentile Score: All the highest raw scores will have normalized Percentile Score of  100 for  their respective session

 

METHOD 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 Examinees 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. This will ensure that there is no bias in the distribution of candidates who shall take the examination. Further, with a large population of examinees 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 ØRaw ScoresØPercentiles 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 P1score 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).as follows