4th Class Mathematics Data Handling Handling data

Handling Data

Synopsis

• A collection of numbers or facts gathered for some specific purpose is called data.
• Interpreting the collected data gives us information.
• The data collected is organised and represented in pictorial form such as tables and graphs.
• A graph is a pictorial representation of data that gives a lot of information clearly.

• Some kinds of graphs:

(i) Bar graph               

(ii) Pictograph  

(iii) Pie chart etc.

• A pictograph has pictures or symbols to represent information.
• A pictograph has a title and gives the definition of the symbol.
• Pictographs enable us to compare information and understand facts better.
• A bar graph also helps us compare the information and understand it better. It is also called a column graph.
• Every bar graph must have,

(i) a title that explains the information given in the graph.

(ii) the scales on the horizontal and vertical axes.

(iii) labels on the axes.

• Circle charts are also used to represent data and compare information.
• In a circle graph, information is represented in different parts of the circle depending on the size of information.

(1-5): The graph shows the number of rubber bands each child has.