A distribution of a single categorical variable shows how frequently each category occurs in the data set. For example, let's say you have a group of people and you want to know their favorite colors. You ask each person what their favorite color is and record their responses. The distribution of favorite colors would show how many people chose each color, such as how many people chose red, how many chose blue, etc. This can help you see which colors are the most popular among the group.
And we visually use a bar plot.
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