6th Class Mathematics Data Handling

 Data Handling

• A collection of numbers gathered to give some information is called data.

• Data can be arranged in a tabular form using tally marks.

• Pictograph, a pictorial representation of data is a useful method to present data attractively.

• Sometimes each picture represents only one object. Then it is called a picture graph.

• Information presented through numbers is called numerical data.

• Numerical data when presented through pictures is called pictorial representation.

• The pictorial or visual representation of numerical data is called a graph.

• There are different types of graphs. Picture graphs and pictographs use pictures to represent numerical data.

• Representing data with the help of bars (or) rectangles in a diagram is called a bar graph or a bar diagram.

• Each bar represents only one value of the data and hence there are as many bars as there are values in the data.

• The length of the bar indicates the value of the item. The width of the bar does not indicate anything.

• All bars should rest on the same line called the base. The bars may be drawn horizontally or vertically.