A bar chart is a graphical display of a nominal (categorical) variable. The reason for the gaps between the bars is to emphasise that the bars can be placed in any order as the variable is categorical.

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A bar chart is a graphical display of a categorical variable, where the bars represent the categories and are spaced apart to indicate that they are not continuous variables. The order of the bars does not matter as the variable is nominal.

A Bar Chart Is a Graphical Display of a Nominal