I. Graphical Data Analysis

• Categorical Variables:

1. Bar Graph: (Visually describes the distribution)

• On the horizontal axis we list each of the possible outcomes that the categorical variable takes on
• On the vertical axis we label the count (frequency) or percent (relative frequency) of cases which fall in each category.
• A bar is constructed over each outcome whose height is equal to the frequency or percentage of outcomes that fall in that category.