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The presentation of data with the help of diagrams - graphs, charts, or pictures to interpret and analyze the data under study is termed as Graphical Presentation.
Data can also be presented with the help of texts or tables. However, with the help of graphs, data can be presented in the most effective manner. Through graphs, a layman can also understand the statistical information of the data.
Let us now discuss some of the important statistical graphs.
The following bar diagram represents the data that we used in the previous line diagram.
The following represents the production of rice in different parts of India.
Sometimes we may be interested in percentages rather than the absolute values, then we may use another type of bar diagram known as a stacked-bar diagram or a divided-bar diagram. Also, a more convenient way of representing percentages is by means of a pie diagram. Let us discuss this one by one as follows:
Frequency Graphs: With this kind of graph we can represent the frequencies for a number of classes or categories. One of the most important graphs to represent frequencies is the Histogram.
Thus, a graph is a very important tool to visualize and represent statistical data.
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