Use of Graphic Displays for Data Research

Why do we use graphical displays of the data from our research, such as Pareto Charts, Bar Charts, Pie Charts, Flow Charts, or Process Control Charts? How has the graphical display of data changed in the last 10 years? How will it change in the next 10 years?

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.... Diagrams can be used only in those places where two or more quantities have to be compared. If the relationship between two variables is to be studied diagrams would be useless for the purpose such studies can be made with the help of graphs only. When we study the relationship between two variables the idea is either to study their cause and effect relationship or to study the ...