Chapter Notes - Data Handling Class 6 Notes | EduRev

Mathematics (Maths) Class 6

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.

Chapter Notes - Data Handling Class 6 Notes | EduRev

  • 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:  Chapter Notes - Data Handling Class 6 Notes | EduRev.
  • 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.

Chapter Notes - Data Handling Class 6 Notes | EduRev


Pictograph:

Chapter Notes - Data Handling Class 6 Notes | EduRev

  • 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:

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


  • 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, Chapter Notes - Data Handling Class 6 Notes | EduRev  represents 100 bulbs. 
  • The key for a pictograph tells the number that each picture or symbol represents.

Bar Graph:

Chapter Notes - Data Handling Class 6 Notes | EduRev

  • 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.

Chapter Notes - Data Handling Class 6 Notes | EduRev

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