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# Chapter Notes - Data Handling Class 6 Notes | EduRev

## Class 6 : Chapter Notes - Data Handling Class 6 Notes | EduRev

The document Chapter Notes - Data Handling Class 6 Notes | EduRev is a part of the Class 6 Course Mathematics (Maths) Class 6.
All you need of Class 6 at this link: Class 6

Data Handling:
• Data is a collection of numbers gathered to get some information.
• To get the required information, all observations should be recorded.

• Tally marks are used to organise the observations. Record every observation by a vertical mark, but every fifth observation should be recorded by a mark across the four earlier marks, like this:  .
• We depict each observation with the help of tally marks.
For example, we have a group of persons and their sizes of shoes.
The tabular form representing the tally marks is as shown here.

Pictograph:

• A picture that visually helps us to understand data is called a pictograph.
• A pictograph represents data in the form of pictures, objects or parts of objects.

Examples:

• In real life, pictographs are used by newspapers and magazines to attract the attention of the readers. A pictograph helps us to answer questions on the data at a glance. To draw pictographs, we use symbols to represent a certain number of things or items.
• For example,   represents 100 bulbs.
• The key for a pictograph tells the number that each picture or symbol represents.

Bar Graph:

• Bar graphs or bar diagrams are helpful in representing the data visually
• In bar graphs or bar diagrams, bars of equal width are drawn horizontally or vertically with equal spacing between them.
• The length of each bar represents the required information. Choosing an appropriate scale for a bar graph is important.
• Scale means the number used to represent one unit length of a bar.

For example, the scale for the bar graph shown here is 1 unit length = 100 children.

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## Mathematics (Maths) Class 6

185 videos|229 docs|43 tests

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