Normalization Marks in RRB NTPC Exam: How Railway Calculates - W3i.iN


Normalization Marks in RRB NTPC Exam: How Railway Calculates

What is Normalization Marks in RRB NTPC Exam? How to Calculate Normalization Marks? The method that Railway will use to Normalize (Equalize) Marks in RRB NTPC Graduate Exam 2016, are explained below. Railway Non Technical (Graduate) Exam result to be announced. Many candidates who are getting less Marks in Railway RRB NTPC Exam 2016 are now asking us what will be Cut off, how RRB normalize Marks of NTPC exam 2016.

Since RRB brought Online Examination (CBT - Computer Based Test) in its Railway NTPC recruitment process, many things have been changed with it, so does Marks Calculation method. Here in this post below, We are going to show you What is Normalization in Railway RRB NTPC Exam and how Normalization Marks in calculated?

Normalization Marks in Railway RRB NTPC Exam 2016

What will be RRB NTPC 2016 Cut off? This is the one question we are being asked since the day RRB held its first ever online exam for ASM, Goods Guard, TA, CA & Clerk posts.  

Dear RRB NTPC Aspirants stop believing in rumours regarding the cut off in Railway RRB NTPC exam 2016. Here is everything you should know about how is Normalization marks calculated?

RRB NTPC Normalization Marks: Explained
These are the some frequently asked questions regarding calculation of Railway’s RRB NTPC Normalization Marks. We have explained this along with Questions & their Answers.

What is Normalization in Railway Exams?

The normalized score is calculated by considering the difficulty level of each set. Since the questions are different in different sets, the difficulty level of a particular set is different from other sets. Normalization is not done in an exam with only shift. Thus, Normalization will be done in Railway’s RRB NTPC Graduate Exam 2016. And it is confirmed, RRB NTPC Result on the basis of Normalize marks will be out.

As you all know, RRB NTPC Exam is held across multiple dates, venues, and shifts, so each shift has a different question paper. Hence, candidates are attempting different questions across different dates (although the underlying syllabus and pattern is the same).

Since, RRB is providing different question sets for different shifts, it is practically impossible to have two question sets of the same difficulty level. That result in, some candidates will end up attempting a relatively easier set compared to another set of candidates.  Therefore, this set of candidates who attempted an easier paper will have a higher average score compared to the set of candidates who attempted the difficult question paper.

Because of this variation in difficulty level of questions sets, RRB will normalize (equalize) the scores of aspirants on the basis of date and shifts across the country. So that, no candidate is at a disadvantage, just because he attempted a difficult set of questions.  
This process of equating marks is called Normalization.

RTI on Normalization Marks in Railway

It should be the endeavour of RRB to ensure that question papers of all shifts are of the same standard. However, since total equivalence of all sets of questions may not be possible. The only thing which is possible is, candidates marks from different-different shift may be normalized by following the method of standard scores, which normalize the mean of the all sets of marks under consideration.

Apart from Railway Recruitment Board (RRBs) Exams, the Staff Selection Commission too uses same method for normalization when examinees are distributed in more than once session. The formula is given below...


1. Suffix 1 and suffix 2 represent two sets of marks.
2. S represents standard deviation.
3. X and Xav represent raw score and average score for set 1.
4. Y and Yav represent raw score and average score for set 2.
5. And Xn= Normalize Score.

Supposing SET - 1 is to be scaled against SET - 2 (Which is declared as standard).

Xn= (S2/S1)^(X-Xav).

In the process of Normalization, The Railway Recruitment Board (RRBs) also ensure that the two sets of candidates are called in a manner which will ensure the same proportion of candidates from SC/ ST, OBC and General communities is required so as to ensure that the quality of these two sets of populations is the same which is a presupposition for equalization.

In addition, there should be a second stage examination, which will be conducted in single session. Candidates numbering 15 times the number of vacancies shall be called for the 2nd Stage examination in order of the common merit of the first phase examination. This will eliminate any possibility of doubts regarding any advantage accruing to the examinees belonging to one set or the other.

Note: It has been finally decided that RRB can hold the examination in any number of shifts, they should follow the same precautions viz. Candidates from different communities to be called in same proportion in all shifts of examinations, equalization of marks of the all sets of preliminary results, as well as holding additional second stage Mains exam in Railway.

How Normalization is done in RRB NTPC Exam?

Before proceeding further, we fist need to know what are Raw score and Average score? Scroll down for info.

Raw Score: The initial stage of the calculation of the scores is by calculating the raw score. Raw score means the marks obtained in each section which is calculated by counting the correctly answered marks after applying penalty for wrong answers (1/3 marks). For example if a candidate attended 90 questions, out of which 15 are wrong, then the raw score will be 90-15-15x(1/3) = 75-15=70.

Average Score: Suppose 100 peoples appeared for a particular exam. There were 4 sets of question papers with different level of difficulties: Set A, Set B, Set C and Set D.
Suppose all candidates appeared in Set A question paper secured average marks of 60%, similarly in Set B 55%, Set C 70%, and in set D 65%. Now this variation in average marks is because of the difference in difficulty level of different Sets. Set B was the most difficult one that's why Average Marks in set B is only 55% whereas the set C was the easier one that's why candidates secured average of 70%. To make it to the same difficulty level they use a method called normalizing the marks.

Here the Average marks will be (60+55+70+65)/4 = 62.5. It means the 60% in set A, 55% in set B, 70% in set C and 65% in set D are equivalent to 62.5% in normalized marks.

Formula to Calculate RRB NTPC Normalization Marks:

1. Step: RRB will evaluate the papers of all aspirants appeared in the exam. The scores obtained by the candidates will be noted as Population of Raw scores. Let score of a Candidate is denoted by X.
2. Step: RRB will find out the average of all Raw scores (Mentioned above). Let it is denoted by Y.
3. Step: RRB will calculate the standard deviation of the scores. It is SD.
4. Step: RRB will calculate the normalized score of a Candidate using this formula. Let it is denoted by Z.

Z = X-Y/SD

Now Look at the example.
Suppose there were four shifts in an exam and difficulty level of four shifts were as follows;
Shift-1: Very easy
Shift-2: Very tough
Shift-3: Intermediate
Shift-4: Tough
Let A, B, C and D are the aspirants from these four shifts respectively. And out of 100 Marks they go got marks;
A scores 80 in shift-1
B scores 65 in shift-2
C scores 75 in shift-3
D scores 68 in shift-4
Now suppose the average score of all candidates from all shifts including A, B, C and D is 42 With standard deviation of the scores as 5.

Can we predict the cut-offs?
NO..! There is no use asking about chances or predicting cut-offs. But there is a standard that you must score > 60%. However, it may increase or decrease depending upon the circumstances. You can also check RRB NTPC Previous cut off marks for idea.

My friend said that he/she scoring above 85, 90+. How is it possible?
People say many things. But most of the times, such stats end up being fake. So, trust only logical and plausible statements. Scoring 100+ or 120+ is possible, but only by sheer hard-work or extreme luck!

What should I do now?
Prepare for the next exam. Post any exam-related RTIs OR share typical questions from the paper OR details of any other exams to be conducted.

This is the most generally used method of calculating Normalization. I guess same method RRB NTPC will use for calculating Normalization marks.