CLASS 6TH | UNIT 6: DATA HANDLING | Data Handling (Including pictograph and bar graph)| REVISION NOTES

Data: A collection of numbers gathered to give some information.

Recording Data: Data can be collected from different sources.

Pictograph: The representation of data through pictures of objects. It helps answer
the questions on the data at a glance.

Bar Graph: Pictorial representation of numerical data in the form of bars (rectangles)
of equal width and varying heights.

• We have seen that data is a collection of numbers gathered to give some information.

• To get a particular information from the given data quickly, the data can be arranged
  in a tabular form using tally marks.
• We learnt how a pictograph represents data in the form of pictures, objects or parts of
  objects. We have also seen how to interpret a pictograph and answer the related
  questions.
• We have drawn pictographs using symbols to represent a certain number of items or
• things.
• We have discussed how to represent data by using a bar diagram or a bar graph. In a
• bar graph, bars of uniform width are drawn horizontally or vertically with equal
• spacing between them. The length of each bar gives the required information.
• To do this we also discussed the process of choosing a scale for the graph.

For example, 1 unit = 100 students. We have also practiced reading a given bar graph. We
have seen how interpretations from the same can be made.