# Bar Graph

Posted in Statistics, Total Reads: 4393

## Definition: Bar Graph

Bar Graph is pictorial representation of statistical data in such a way that length of the rectangles in the graph represents the proportional value of the variable. Bar Graphs are generally used to compare the values of several variables at a time and to analyze data. The length of the bars (horizontal or vertical) represents the frequency of the variable and is applicable to discrete values only.

Types of Bar Graphs

1. Single Bar Graph – Such Bar Graphs are used to represent discrete value of each variable drawn in opposite axis.

In this bar graph, we can see that bars represent values of discretevariables X, Y, Z in y-axis. This type of graph is called as Single Bar Graph.

2.  Grouped Bar Graph – Such Bar Graphs represent values of more than one variable in the very same category. Rectangular bars are stacked side by side and they are color coded to distinguish themselves.

In this bar graph, we can see that blue, orange, grey colored bars belong to same category which are stacked side by side and are representing their respective frequency. Such type of graph is called as Group Bar Graph.

3. Stacked Bar Graph – Such Bar Graphs have bars subdivided into parts which represents the discrete value for the variable that represents the portion of the bar.

In this bar graph, we can see that blue, orange, grey colored portions in each bars representing series 1, series 2, and series 3 respectively belong to different categories and represent respective values in y-axis. This type of graph is called as Stacked Bar Graph.

Hence, this concludes the definition of Bar Graph along with its overview.

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