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Recording Data

Let us consider a group of students who would like to play indoor games. The teacher of Class VI
asked the students to give their choice of games out of ludo, chess, carrom, or checker. Radha, a
student of the class is asked to prepare the list. She prepared a list of all the students and wrote
the choice of games against the roll number of each students, as shown below.

Roll No. Game Roll No. Game Roll No. Game Roll No. Game
1 Ludo 8 Ludo 15 Carrom 22 Checker
2 Ludo 9 Carrom 16 Checker 23 Checker

3 Carrom 10 Chess 17 Chess 24 Carrom
4 Checker 11 Checker 18 Ludo 25 Carrom
5 Carrom 12 Chess 19 Checker 26 Ludo

6 Chess 13 Carrom 20 Chess 27 Checker
7 Checker 14 Carrom 21 Carrom 28 Ludo
This list would help the teacher to find how many game boards are needed. But she will have to
count each game one by one, which is quite cumbersome. It is not a systematic way of collecting
and recording data. Such data is called raw data. To make it easy for interpretation, we must
organise the data.

Organising Data

The teacher asked the other students to organise the data listed by Radha. Deepak, another student
of the class used a tally mark (|) to represent one student and prepared a table as shown below.

Game Tally marks Number of students

Ludo |||||| 6
Chess ||||| 5

Checker |||||||| 8
Carrom ||||||||| 9

Total 28

The teacher also made a table and used a tally mark (|) to represent one student, but for five
students, she used a group of five tally marks as by putting a bar (|) over the previous four tally
marks. Observe that we can read the teacher’s table much more clearly and faster.
Game Tally marks Number of students

Ludo | 6

Chess 5
Checker ||| 8

Carrom |||| 9
Total 28

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