What is Data?
Data is defined as the collection of information, which may either be saved or obtained from other sources.
The data collected directly is called primary data, and the data collected from other sources is called secondary data.
There are two methods of data collection.
Direct Method
In this method, the information is collected directly from sources, by visiting different places, etc.
Indirect Method
In this method, the information is collected indirectly, either by contacting different people or from the newspaper, radio, and other media sources.
Here is an example of data.
This is student data collected from their school. The given data has been arranged, according to the number of boys and girls studying in the respective classes.
| Class | Total Number of Students | Boys | Girls |
| 1st Class | 85 | 57 | 28 |
| 2nd Class | 72 | 42 | 30 |
| 3rd Class | 65 | 30 | 35 |
| 4th Class | 80 | 47 | 33 |
| 5th Class | 80 | 40 | 40 |
| 6th Class | 76 | 41 | 35 |
| 7th Class | 81 | 41 | 40 |
| 8th Class | 90 | 60 | 30 |
| 9th Class | 84 | 45 | 39 |
| 10th Class | 90 | 53 | 37 |
Graphical Representation of Data
We can represent the collected information or the data in different tables and through other graphs.
The graph represented by bars is called a bar graph.
Bar graph
The graph represented with the help of a circle/circular shape is called a pie chart.
Pie chart
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