1. The area principle says that the proportion of the area of a graph devoted to a category must match the number of cases found in the category.
2. Put the labels of the categories in order in a bar chart when showing the frequencies of an ordinal variable.
3. The bar chart of a recoded categorical variable has the same number of bars as the bar chart of the original categorical variable.
4. A Pareto chart puts the modal category first.
5. The median of a categorical variable is the category with the most items.