Meaning and Significance of Diagrams and Graphs
A diagram is a visual form for presenting statistical data for highlighting the basic facts and relationship which are inherent in the data. The diagrammatic presentation is more understandable and it is appreciated by everyone. It attracts the attention and it is a quicker way of grasping the results saving the time. It is very much required, particularly, in presenting qualitative data.
The quantitative data is usually represented by graphs.Though it is not quite attractive and understandable by a layman, the classification and tabulation techniques will reduce the complexity of presenting the data using graphs. Statisticians have understood the importance of graphical presentation to present the data in an interpretable way. The graphs are drawn manually on graph papers.
Diagrams and graphs are extremely useful due to the following reasons:
· They are attractive and impressive
· They make data more simple and intelligible
· They are amenable for comparison
· They save time and labour and
· They have great memorizing effect.