Follow GATE formula
CAT 2016 percentile calculator is on the lines of GATE formula. Sharing the scoring pattern in CAT 2016 exam, IIM Bangalore has declared “In order to ensure fairness and equity in comparison of performances of the candidates across different test sessions, the scores of the candidates shall be subjected to a process of Normalization. The Normalization process shall adjust for location and scale differences of score distributions across different forms. After normalization across different forms, the scores shall be further normalized across different sections. The scaled scores obtained by this process shall be converted into percentiles for purposes of shortlisting.
For reporting purposes, Scaled Scores for each section (Section I: Verbal Ability and Reading Comprehension (VARC), Section II: Data Interpretation and Logical Reasoning (DILR), and Section III: Quantitative Ability (QA)) and Total along with the Percentiles shall be published.
The process of Normalization is an established practice for comparing candidate scores across multiple Forms and is similar to those being adopted in other large educational selection tests conducted in India, such as Graduate Aptitude Test in Engineering (GATE). For normalization across sections, we shall use the percentile equivalence.”
Most of the websites claim to be nearly accurate but none of the percentile predictors share how they have arrived at the percentile score of the candidates based on their attempts in CAT 2016 in different sections.
This confusion persists although CAT 2016 website claims to have the most transparent process on score normalization and calculation of percentile. The process claims to focus on Fairness, Equity and comparison of performances across both the test sessions in CAT 2016. But the Normalization process has only scanty details which may not reflect the clear picture of percentile calculation formula in CAT 2016.
Understand the CAT 2016 percentile calculation process
To understand the score normalization process in CAT 2016, you are supposed to understand first the GATE process which stands a bit changed. Those appearing in GATE or have understood the process can understand it better but for those who are unaware about the process have to understand the GATE process first. In fact the commerce, science, medical, paramedical and graduates in Humanities who appeared in CAT 2016 still remain oblivious of the percentile calculation formula in CAT 2016.
What is GATE scoring & normalization process?
During 2016, the CE, CS, EC, EE and ME examinations are conducted in multiple sessions. Suitable normalization process is therefore applied to take into account any variation in the difficulty levels of the question sets across the different sessions. The normalization is done based on the fundamental assumption that "in all multi-session GATE papers, the distribution of abilities of candidates is the same across all the sessions".
According to the GATE committee, this assumption is justified since "the number of candidates appearing in multi-session subjects in GATE 2015 is large and the procedure of allocation of session to candidates is random. Further it is also ensured that for the same multi-session subject, the number of candidates allotted in each session is of the same order of magnitude."
A candidate's percentile denotes the percentage of candidates scoring lower than that particular candidate. It is calculated as: Percentile = ( 1 - All India rank ( No. of candidates in that subject) x 100%.
Application of formula in CAT 2016
The formula to calculate the percentile in CAT 2016 can be devised. At MBAUniverse.com and Vista Mind experts have been working and have decoded the pattern of normalization and calculation of percentile in CAT 2016. The score normalization process formula as understood by CAT expert would be as follows-
Application of Formula in CAT 2016- Example
Total Test takers = 2,00,000
slots = 2
Test takers in each slot = 1,00,000 [ .1% of it = 100]
So, according to the given formula, normalized score = (192-112)(170-110)/(190-110) + 112 = 172