These are collected to know whether the weights of students are appropriate to their heights. The data is given below.

**Organisation of Data**

We first collect data, record it and
organise them. To understand this, consider an example which deals with the weights
of 10 students of class VII. These are collected to know whether the weights of
students are appropriate to their heights. The data is given below.

● Anbu-20 *kg*; Nambi-19 *kg*; Nanthitha- 20 *kg*; Arul- 24 *kg*;

● Mari-25 *kg*; Mathu-22 *kg*; Pavithra – 23 *kg*; Beeman- 26 *kg*;

● Arthi-21 *kg*; Kumanan-25 *kg*.

Let us try to answer the following questions.

(i) Who is
the least weight of all?

(ii) How
many students weigh between 22 *kg* to 24 *kg*?

(iii) Who
is the heaviest of all?

(iv) How many children are above 23 *kg*
and how many are below 23 *kg*?

The data mentioned above is not easy
to understand.

If the data is arranged according to
the order of weights, it will be easy for answering the questions. Observe the following
table.

Now we can answer the above questions
easily. Hence it is essential to organise the data to obtain any kind of inferences
from the data.

Organisation of data is helpful to understand
quickly and get an overall view of data. It becomes easy to understand and interpret
which in turn also helps to take decision accordingly.

Tags : Statistics | Term 3 Chapter 5 | 7th Maths , 7th Maths : Term 3 Unit 5 : Statistics

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7th Maths : Term 3 Unit 5 : Statistics : Organisation of Data | Statistics | Term 3 Chapter 5 | 7th Maths

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