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CBSE Class 6 Maths Chapter 9 Data Handling Notes

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In our day to day life, we see various kinds of tables which consist of numbers, figures, names, etc. These tables provide ‘Data’. Data is a collection of numbers gathered to give some information.

Recording Data
Sometimes some information is required very quickly. It is possible only when we adopt some suitable system of collecting data.

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Organising Data
If we want to get particular information from the given data quickly, die data can be arranged in a tabular form using tally marks.
Data Handling Class 6 Notes Maths Chapter 9

Pictograph
A pictograph represents data in the form of pictures, objects or parts of objects. The picture usually helps to understand the data. It helps answer the questions on the data at a glance. Pictographs are often used by dailies and magazines to attract the attention of the readers. However, it requires some practice to understand the information given by a pictograph.

Interpretation of a Pictograph
Simply by observing a pictograph, one can answer the related questions very quickly.

Drawing a Pictograph
We draw pictographs using symbols to represent a certain number of items or things.

A Bar Graph
Representing data by pictograph is tedious and time-consuming. So, a bar graph supplies with another way of representing data visually.
In a bar graph or a bar diagram, bars of uniform width is erected horizontally or vertically with equal spacing between them. The length of the bar gives the required information.

Interpretation of a bar graph
Looking at the bar graph; we can answer the related questions quite easily.

Drawing a Bar graph
First of all, we draw a horizontal line and a vertical line on the horizontal line, we drawbars and on vertical line, we write the numerals. However, we choose a proper scale. For example, 1 unit =100 students. Good practice helps reading a given bar graph a lot.

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