One of the best method through which statistical result can be displayed or presented is through diagram and graphs. We can found it in the different news papers, magazines, journals, etc. Diagram are more attractive to the eyes and are better suited for the publicity and propaganda. In fact these days it is difficult to find any research work without the diagram support. On the other side Graphs we generally make use of graph paper, In other words a graph represent mathematical relationship between two variables.
Types of Diagrams:
(1) One -Dimensional Diagram or Bar Diagram
(a) Simple Bar Diagram: In the simple bar diagram is used to represent only one variables. For example the figure o sales, production, population etc. The sales figure of Dell Co. as below:
(b) Sub-divided bar diagram: In a sub-divided bar diagram each bar represent the magnitude of a given phenomenon is further sub divided in its various components. For example the students scored different marks in different subject as below
(C) Multiple bar diagram: In multiple bar diagram two or more set of interrelated data are represented. The only difference is that since more that one phenomenon is represented, different shades, colours, dots or crosses are used to distinguished between the bar as below:
(d) Deviation bars: The Deviation bar are used to calculate the net quantities (excess or deficit).
(2) Two Dimensional Diagram:
| Sachin Scores | |
| 1's | 13 |
| 2's | 12 |
| 3's | 2 |
| 4's | 4 |
| 5's | 1 |
| 6's | 6 |
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(3) Pictograms :
Graphs:
